Former Tottenham striker Peter Crouch believes they face a battle this summer to keep hold of Harry Kane and Heung-min Son.
Crouch claimed that Tottenham's shock Europa League exit to Dinamo Zagreb could push the star pair further out the Spurs exit door.
He told BT Sport: "Going out of Europe tonight, their season is hanging by a thread. When I look at someone like Harry Kane trudging off the pitch, I'm thinking - he's Champions League, he shouldn't even be playing in this competition.
"He's a Champions League player, he should be there talking alongside Lewandowski, Haaland, Mbappe... (and) Kane. He should be up there with those (players). He's gone out to Dinamo Zagreb today and that's the worrying thing - where's his head at?
"It's not just the manager, (it's) the players. Son (and) Kane, players who deserve to be playing at a higher level than Europa League. Of course they are loyal to Tottenham and we all hope they will be, but games like that certainly don't help."
