Tottenham defender Vedran Corluka fears the club will miss out on Champions League qualification, blaming their slide on a lack of squad rotation.
After spending much of the season in contention for the Premier League title, Harry Redknapp's men have fallen to fifth with three wins from 14 games.
"I wouldn't be surprised if they finished sixth," Corluka, on loan at Bayer Leverkusen,
"They didn't rotate enough, they don't have depth on the bench. That's the main problem.
"I watched almost every Spurs game and the played them all with the same 11, 12, 13 players and that's why the players now are really tired."
When asked if missing out on a Champions League place would constitute failure, Corluka added: "Yes, especially because three months before they were in the title race challenging Manchester City and [Manchester] United.
"Tottenham, for me, had one of the best teams in England and of course it will be an unsuccessful season if they don't go to the Champions League."