Alderweireld, 30, has made 38 appearances in all competitions for Spurs this season
Toby Alderweireld has thrown his Tottenham future into doubt after admitting he is unsure where he will be playing next season.
The Belgian defender, who turned 30 earlier this month, has been an integral part of the Spurs squad throughout his four-year spell at the club to date.
At the turn of the year, Spurs triggered a clause in Alderweireld’s contract to extend his deal until 2020, but in doing so activated a £25m release clause in the summer transfer window.
Speaking to Sky Sports News ahead of his country’s upcoming European qualifiers against Russia and Cyprus, the ever-present defender said: “There’s a lot to play for this season.
“And in the end I have a year contract left at Spurs, so I don’t look further than this season.
“Other things I don’t know. I am very happy at Spurs, so we will see what the future brings.
“I still feel very fit. I think I played a lot of minutes this season so I showed that I am fit – I don’t feel 30, I feel younger.
“So as I said, I am very happy and I just try to watch game-by-game.
“This season there is a lot to play for so I will give my best for that.”
Manchester United are long-term admirers of the former Southampton defender, who has also attracted from some of Europe’s other top clubs.