Dele Alli has agreed a new Tottenham contract tying him to the club until 2022, the club announced Monday. 
Alli has already been handed improved terms at White Hart Lane despite earning a new five-year deal in January. The attacking midfielder, signed from MK Dons in February 2015, has been a revelation in north London since making his Spurs debut in August last year, helping the club challenge for the Premier League title and being selected for England's Euro 2016 squad. 
He is considered one of the club's key player along with his English compatriot Harry Kane. 

Source : QNA