Jan Vertonghen's agent insists the Tottenham defender still has plenty to achieve in the game.

The defender, 32, looked visibly upset after being taken off less than 10 minutes into the second half of Spurs' 3-2 FA Cup fourth-round replay win against Southampton.

His contract expires this summer and it is rumoured an extension is unlikely.

"His reaction had nothing to do with his future," said his agent Tom de Mul.

Het Laatste Nieuws, he added: "He was just disappointed when he got subbed off. He was unhappy with his performance against Southampton in the first hour and with the team's level."

Vertonghen is off contract in June and De Mul says that while no agreement has yet been reached, the "door is still open" for a new deal with the club.

"Jan still wants to achieve great things with Spurs. He wants to qualify for the Europa or Champions League, to win the FA Cup. He is 32, but still very ambitious.

"He is focused. He still has so many targets. The Euros are a super important goal too."

He added: "Jan is still super happy at Spurs and loves London. He is still very committed.

"There's a lot of respect for Tottenham, just like there is a lot of respect from the club towards us. That's logical after eight seasons. There is a connection."