Joe Hart and Danny Murphy discuss how Tottenham's lack of clincal finishing saw them miss an opportunity to secure Premier League safety and analyse who will avoid relegation with Spurs and West Ham in danger of going down on the final day of the Premier League season.
The fine margins that may yet condemn Tottenham Hotspur to the most humiliating relegation in Premier League history could be measured in seconds at Stamford Bridge.
But if Spurs do drop into the Championship on Sunday it will not be because of one incident after a campaign of discord, instability and rank incompetence on and off the pitch.
They can still shape their own fate at home to Everton on the final day of the season, with a point enough due to a better goal difference of 12 over third-bottom West Ham, but a defeat and a Hammers win at home to Leeds would relegate them.
Spurs will, however, look back on a decisive incident towards the end of their 2-1 defeat at Chelsea as one when the opportunity to avoid what will undoubtedly be an afternoon of nerve-shredding tension at Tottenham Hotspur Stadium escaped them.
Richarlison had given Robert de Zerbi's disappointing side hope, after Enzo Fernandez and Andrey Santos gave the hosts a deserved two-goal advantage, when Chelsea's combative left-back Marc Cucurella unceremoniously dragged Spurs defender Micky van de Ven to the floor.
It came as Mathys Tel prepared to take a corner and Spurs demanded a penalty that never came, their disbelief doubled when Cucurella was cautioned over the incident.
Video assistant referee (VAR) checks detected his foul came seconds, maybe even one second, before the ball came into play, meaning a penalty could not be awarded.
Referee Stuart Attwell could only take action against Cucurella with a yellow card, and once VAR confirmed the ball had not been kicked there was no room to initiate a review and subsequent spot-kick.
Former Chelsea and England striker Daniel Sturridge told Sky Sports: "One second difference and it is a guaranteed penalty. Cucurella is so lucky."
It was the tightest of calls.
Spurs boss De Zerbi refused to dwell on it, but said the Everton game was arguably "more important" than the club's Europa League final against Manchester United last season, which they won in Bilbao.
He added: "It is not my business. My business is to focus on preparing the next game and to get the points we need because Sunday is the final for us.
"This game is important, more than playing for a trophy. Last season ended with playing for a trophy. We play for something more important than a trophy because of the pride and history of the club.
"You can win a trophy but it does not change anything. The most important thing is the pride and dignity of the club, so that we can go on holiday, in the Premier League.
"We have to stay alive. Sunday against Everton is a big day for us."
The arguments, though, continued after the final whistle, led by substitute James Maddison.
But the real frustration will come from the fact Spurs had the opportunity to banish all relegation fears here and were simply not good enough to take advantage.
They were up against a Chelsea side who had played a strength-sapping Wembley FA Cup final against Manchester City on Saturday, suffering the psychological blow of a narrow defeat.
If Spurs had won, all worries were over. A point would also have effectively guaranteed safety.
It was almost as if it took Chelsea's second goal to actually make them aware of the trouble they were in, such was their lackadaisical approach until then.
The late flurry was exactly that. Too late.
De Zerbi knows a point will still spare this giant, dysfunctional football club the ultimate embarrassment of a drop into the the second tier for the first time since 1977 - but can Spurs be trusted to deliver?
They have not won a home league game since beating Brentford on 6 December under the leadership of Thomas Frank, whose managerial reign seems an age ago.
This loss at Stamford Bridge was their 17th of the season in the league, while they lost 22 in the previous campaign under Ange Postecoglou, despite winning the Europa League and finishing fourth from bottom.
In other words - this trouble has not just crept up on Spurs. They flirted with danger last term and survived. This time they may not be so lucky.
De Zerbi may feel fate was against them on this night, but defeat came after a performance that was strangely lacking in drive and urgency given the scale of the stakes.
After a brief revival with recent away victories at Wolverhampton Wanderers and Aston Villa, Spurs have put themselves back into the hazardous position on the final day after carelessly tossing away two points at home to Leeds United, then producing a performance here that did not kick into gear fast enough.
As they left west London miserable and under the dark cloud of relegation, fierce north London rivals Arsenal were celebrating their first Premier League title for 22 years.
The final insult may be yet to come.
It would be the season of nightmares for Spurs to suffer relegation as Arsenal are crowned champions, having not won the top-flight title themselves since 1961.
It is in the hands of De Zerbi and his players to avoid such ignominy - but their form in a wretched campaign points to a day of discomfort when they face Everton.
A foul - or in this case a penalty - can only be awarded if the ball is in play.
If the offence happens before the corner is kicked then the referee can't give a foul, they can only take disciplinary action - in this case a yellow card to Marc Cucurella.
The VAR will then check to make sure the ball has not been kicked while there is foul contact. If the attacker has already been pulled down there is no route for the VAR to initiate a review.
But two weeks ago, Everton were wrongly denied a penalty against Manchester City when Merlin Rohl was dragged the the floor by Bernardo Silva.
The VAR decided the holding had stopped before a corner was taken, but the Premier League's key match incidents panel ruled that to be incorrect.
Tottenham's incentive could not have been greater as they travelled to Stamford Bridge to face Chelsea. Premier League survival was in their own hands.
They faced a Chelsea side whose form had been indifferent, and who had just suffered the disappointment of losing the FA Cup final to Manchester City.
Spurs started brightly, but once Chelsea went ahead through Enzo Fernandez there was a lack of urgency until it was too late, namely after Andrey Santos had put them two goals in arrears.
Santos' goal came just as head coach Roberto de Zerbi was about to make three substitutions, including James Maddison, who led lengthy Spurs protests to referee Stuart Attwell at the final whistle.
The point of contention was that penalty incident when Marc Cucurella clearly dragged Micky van de Ven to the floor, but the ruling was that the ball was not yet in play - a decision that infuriated Spurs.
In reality, despite a late flurry, Spurs did not produce enough creation or threat when the stakes were so high.
Now it all rides on Sunday's meeting with Everton at Tottenham Hotspur Stadium - with Spurs' top-flight status hanging in the balance.
Spurs know a point will almost certainly be enough to keep them in the Premier League, but nerves will be jangling after such poor form at home this season.
Tottenham manager Roberto de Zerbi, speaking to Sky Sports: "We created a first chance to score with [Mathys] Tel. It was a big save for Robert Sanchez.
"Then we concede one great goal because [Enzo] Fernandez, a big player, we could do something better. Then we stay in the game until the second goal, we lost a stupid ball. We conceded a second goal. But before the second goal, we created a big big chance with Richarlison.
"I think we played a very good game. We lost.
"But now is not the time to think too much of this game. We have to prepare the next game. We play in our stadium with our fans. With our qualities, with character, with pride and courage we have to play.
"But I am positive because today, we played a good game."
Spurs midfielder Joao Palhinha, speaking to Sky Sports: "We have to [use the defeat as fuel for final game]. That's the reality. We cannot think too much about the result.
"We more than played well. We needed the result to finish this thing that we have been living for a long time. This team needed a different result today. I think we deserved it.
"It's been a tough season for us with a lot of things happening inside the club. The reality is we have a final on Sunday. We want to keep Tottenham in the Premier League and we will go with everything.
"I don't think I need to speak too much about this game because we wanted to win. I think we deserved more. It's a big frustration.
"We will have Tottenham in the Premier League next season, I don't have any doubt about that because it's where the club belong. Let's go with everything."
Tottenham miss the opportunity to secure Premier League safety after they're beaten 2-1 by Chelsea at Stamford Bridge, meaning their fight against relegation will go down to the final day, with the club sitting two points above the bottom three.
MATCH REPORT: Spurs' relegation fight goes to final day after loss at Chelsea
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Post
Chelsea 2-1 Tottenham
Roberto De Zerbi must get through some calories during a game. The man's never still!
He's got a bit more energy now after that goal.
Post
Chelsea 2-1 Tottenham
Paul Robinson
Former Spurs goalkeeper on BBC Radio 5 Live Sports Extra
They couldn't could they? Surely not, they've been so poor this evening.
It's a decent piece of play from Tottenham, disappointing from Chelsea's point of view.
'Guardiola is the greatest ever'
FT: Bournemouth 1-1 Manchester City
Matt Upson
Former Premier League defender on BBC Radio 5 Live at Vitality Stadium
Pep Guardiola looked a bit upset, didn't he? He looked deep in thought. You cannot take away the standing that, that man has in this game. He is the greatest ever.
A goal of huge consequence and timing
Chelsea 2-0 Tottenham
Nizaar Kinsella
BBC Sport Chelsea reporter
It was a goal at just the right time for Chelsea and the worst time for Tottenham to concede.
Spurs had been building up threatening attacks over the previous 15 minutes and were looking to capitalise by making three substitutions.
However, as James Maddison, Pape Matar Sarr and Djed Spence were stood their on the touchline, Andrey Santos was tucking his finish into the bottom corner.
Post
Chelsea 2-0 Tottenham
Unless Spurs can find two unlikely goals, the relegation battle is going all the way to the final day of the season.
West Ham or Spurs, take your pick.
'What a gift for Chelsea'
Chelsea 2-0 Tottenham
Paul Robinson
Former Spurs goalkeeper on BBC Radio 5 Live Sports Extra
Micky van de Van is absolutely furious with Kolo Muani. Such a poor pass in the middle of the field.
It's a gift for Chelsea but it's a long way from goal - they still had the opportunity to defend it.
Chelsea say 'thank you very much'.
Post
Chelsea 1-0 Tottenham
Paul Robinson
Former Spurs goalkeeper on BBC Radio 5 Live Sports Extra
You can see the frustration. If you look at the body language of those players in yellow shirts, nothing has really quite clicked for them tonight.
Post
Chelsea 1-0 Tottenham
The lack of quality for Spurs up top is really apparent tonight.
Chelsea are pretty comfortable with what's being thrown at them.