Tottenham midfielder Dele Alli has signed a new contract to keep him at the club until 2021.

Alli has made a huge impact since completing his £5million move from MK Dons last summer, scoring five goals in 18 Barclays Premier League appearances.

The 19-year-old has also broken into the senior England set-up and scored his first international goal in the 2-0 victory over France in November.

"We're delighted to announce that @Dele_Alli has signed a new contract with the club which will run until 2021," Tottenham posted on their official Twitter account.

Alli signed from MK Dons in January 2015 but spent the remainder of the season on loan, helping the Buckinghamshire club into the Sky Bet Championship.

He made his Premier League debut on the opening day of this season at Manchester United and has since gone on to make 25 Spurs appearances in all competitions.

Having made his England Under-21 debut in September, he capped his meteoric rise by making his first senior appearance in a Euro 2016 qualifier against Estonia the following month.

Speaking to Spurs TV about his new contract, Alli said: "The club has been really good to me since I've been here.

"We've got a great young team and I'm happy to be here.

"All the boys and staff have helped me settled in well and made it easy to go out there and do my stuff.

"That helps you with your confidence and you can focus on the football, and that's obviously important as a young footballer moving away because it can be quite scary at times."

Spurs are currently fourth in the Premier League and there is growing belief that Mauricio Pochettino's young and exciting team can mount a sustained challenge for a Champions League spot, if not compete for the title itself.

Alli has quickly become an integral part of Pochettino's team, but he insists he still has much to learn as he seeks to secure his place in the England squad at Euro 2016 this summer.

"I've got a few games now and I've shown what I can do and established myself as a Premier League player," Alli said.

"But I'm 19, I've still got a lot to learn and I can't think of a better place to do that.

"When I was moving from MK , the philosophy they had as a club, it was important I found that wherever I went.

"The football suits me as a player and it's a great club to be at.

"Nothing changes with the contract, I'm still going to keep working hard on and off the pitch and doing as well as I can."