Manchester United have been given the clearest warning yet against bringing in Oliver Glasner as their new manager in the shape of rivals Tottenham Hotspur.
Spurs are also on the hunt for a new manager this summer, following in United's footsteps by sacking Thomas Frank just weeks after the Red Devils relieved Ruben Amorim of his duties at Old Trafford.
The two Premier League giants are likely to be shopping in the same pool when it comes to managers, with both deciding to appoint interim bosses between now and the end of the season.
Michael Carrick Stakes Claim To be Permanent Man Utd Manager
Michael Carrick has performed well so far in the United hotseat, winning four and drawing one of his five games in charge. The Red Devils sit fourth in the Premier League table and on course to qualify for the UEFA Champions League next season.
Glasner is out of contract at Crystal Palace in the summer and the current second favourite with the bookmakers to replace Amorim full-time - with only current incumbent Carrick ahead of him in the market.
But should United go after Glasner?
The Austrian would be making the step up from a smaller club in Palace, to one of the biggest in the world in United. Frank showed at Tottenham that that step up is not easy to make.
Glasner's Record In Germany Comes Under The Microscope
It's not just Palace either. Glasner has pedigree, that is for sure, with a long career spent in the German Bundesliga. But again, he managed Wolfsburg and Eintracht Frankfurt across four seasons in Germany, clubs who have won the Bundesliga just twice between them in their entire history.
While he improved both sides when it came to European competition, Glasner's best Bundesliga finish was fourth with Wolfsburg in his second season. He finished 7th with both Wolfsburg and Frankfurt and 11th with the two clubs too.
At Palace there has been a tendency to play on the counter-attack, with the Eagles at their best when they have had the likes of Michael Olise - now at Bayern Munich - Eberechi Eze - now at Arsenal - Ismaila Sarr and even Daniel Munoz getting in and around striker Jean-Philippe Mateta.
Does Glasner's Formation Suit Manchester United?
There's also the question over his preferred formation, with Amorim chastised regularly for sticking to his rigid 3-4-3 formation. Glasner is another who likes to play with a back three, suggesting it might not be the best fit.
At Manchester United the manager will be expected to play a high-tempo possession-based football, setting the standard and not reacting to other opposition tactics - something Frank was accused of doing too much at Spurs.
It is something you can get away with at smaller clubs, but there is more emphasis on you and how you approach games when you're at one of the big clubs.
Roberto De Zerbi, Julian Nagelsmann and Luis Enrique have all also been linked with the Manchester United job and all have the higher level experience that the fans would crave in their next manager.