The Spurs youngster has been a revelation for club and country this season.
Alli, 19, has burst on to the scene in fine fashion this season, emerging as one of the continents hottest properties after scoring seven times and setting up another 12 in all competitions so far.
This past week has also seen the youngster shine for England following a wonderful midfield display in last weekend's 3-2 win over Germany in a friendly in Berlin.
Ferguson is hugely impressed by his start to life at Spurs and the Three Lions, claiming that he has not seen such an English talent since Gascoigne.
"He's the best young midfield player I've seen in England for many years, probably going as far back as (Paul) Gascoigne," he is quoted as saying by the Daily Record.
"The boy's got everything - it's early doors for him, of course, but the signs are fantastic."
Few England or Spurs fans would disagree with Fergie's sentiments. Alli, at the moment, is looking like a star of the future and such a player can play a huge role for club and country in the coming years.
He is back in action on Saturday when the Lilywhites - five points behind Premier League leaders Leicester City - take on Liverpool at Anfield.