Tottenham defender Jan Vertonghen convinced Vincent Janssen will prove his worth at White Hart Lane

Tottenham defender Jan Vertonghen is certain Vincent Janssen will be a hit in the Premier League and believes the Netherlands international is finally starting to show his true self at White Hart Lane. Janssen failed to hit the ground running since joining from AZ Alkmaar for £17m last summer and has been linked with a move away at the end of the campaign.

Despite his troubles, Belgium international Vertonghen believes his much-maligned teammate has improved in recent weeks and is finally starting to adapt to life in the Premier League. The 22-year-old has seen more action due to the injury suffered by Harry Kane and is gradually beginning to learn the differences between the English top-flight and the Eredivisie.

"Every team in Holland wants to attack and they don't really think about defending," Vertonghen told The Evening Standard. "That's the philosophy – just play 4-3-3 and play good football in possession, and don't think too much about defending. That's why I think strikers get so many chances and goals in Holland, and obviously it's different here.

"I think the tactics are less naïve. Swansea City defended for 90 minutes but they were very close to beating us. But Vincent is adapting very well now. He understands the way the gaffer wants him to play. He's so strong, he just needs that goal and then he'll be on fire.

"I'm so happy for him," the Tottenham defender added. "Vincent's working very hard. Obviously it wasn't the start he wanted but he's showing now what he's capable of. He made a big difference when he came on against Swansea. Can he succeed in the Premier League? Definitely, yes. I am convinced of it."

Tottenham's faint hopes of overhauling Chelsea and winning the Premier League title were kept alive in dramatic fashion at The Liberty Stadium on Wednesday. Late goals from Dele Alli, Heung-min Son and Christian Eriksen handed Tottenham all three points against Swansea, and Mauricio Pochettino's men will hope to ramp up the pressure on Antonio Conte's men with victory over Watford on Saturday in the early kick-off.