Ben Davies will miss the rest of Tottenham's season and Ryan Mason says it is too early to say if he will be ruled out of the Euros too.
Welsh left-back Davies has not played since Spurs's 2-0 win at Aston Villa in March, which he got through despite playing with the problem during that game.
Wales' manager Robert Page described the injury as 'significant' at the time.
And Davies has yet to make a full recovery despite initial estimates that he would sidelined for around three weeks.
Mason said: 'Ben [Davies] is the only one who hasn't trained. He still hasn't trained. To be honest, I'll be surprised if he's in contention for any of our three remaining fixtures but everyone else has trained this week.
'I am not sure [if he will be fit for the Euros]. Ben was out doing some individual work and hopefully he will progress very nicely over the next few days and the next week.
'It is too early to make a decision on the Euros but I am sure Ben feels confident on that.
'We just know he has been out for such a long time, it is not very realistic to expect that he will return to training or play a game in the next ten days.'
Spurs host Wolves on Sunday, Aston Villa on Wednesday and then finish their season at Leicester next Sunday.
Wales face France and Albania in friendlies before kicking off their Euros Group A campaign against Switzerland in Baku.