Maddison has recently returned from an ACL knee injury, and played the final 21 minutes of a midweek 2-1 Premier League defeat at London rivals Chelsea in only his second appearance of the season.
A point at Stamford Bridge would have sent West Ham down, given Tottenham’s superior goal difference, but the survival battle now rolls on to Sunday, when a win or draw at home to Everton will guarantee Spurs’ safety.
Maddison admitted it as a far cry from 12 months ago when Tottenham were lifting the Europa League trophy after beating Manchester United.
A return to the Championship for the first time since the seven-cap England international bid farewell to Carrow Road in 2017/18, with 22 goal contributions in 44 appearances, would be unthinkable.
“It’s non-negotiable. We have to (get over the line) for this club,” he said, quoted by PA.
“We’ve got to give everything for this club, for the badge and for our fans. It is unacceptable and a little bit embarrassing that we’re in this position as Tottenham Hotspur but it’s the reality unfortunately and it’s up to us to get out of it.
“Sunday is going to be a big day. We’re going to need everyone, we’re going to need our fans who were absolutely unbelievable today by the way.
“Even at 2-0 down (at Chelsea) you could just hear them and I genuinely think we’ve got the best away support in the league. We need to repay them with a good performance and some points on Sunday to secure Premier League survival.”
Quizzed on how long he could feature for Tottenham’s Sunday crunch against Everton, Maddison told Sky Sports: “Well, anyone who has worked in football or has been through this injury, it is not as easy just to drop back in.
“It would be catastrophic for my career if something was to happen and we weren’t safe or followed the protocols from the specialist, but obviously I want to help the team as much as I can.
“Obviously I’ve been out for a long time so I’m not going to be at my fluid and fluent best, but I feel good and I’ve just got to try to help the team with whatever many minutes I can.
“I've obviously had a massive injury, so it's one of them you have to respect the injury a little bit and that's probably why I am not starting games, but I've been out for a little while and I am going to do what I can on Sunday. I did (at Chelsea), it wasn't enough but we've got to keep trying and keep battling for our fans.”
Recently-appointed Tottenham boss Roberto De Zerbi indicated Maddison would remain limited to a short cameo against Everton this weekend.
“James Maddison can’t play more than 20 or 25,” he said. “I have a medical staff behind me, I am not a doctor, I am not physical coach and I have to follow what they say.”