Manchester United have been dealt a fresh blow as winger Ashley Young is reportedly a doubt for the Red Devils' crunch clash against Tottenham on Sunday after he picked up a knock during their FA Cup loss to Arsenal.

According to the Manchester Evening News, the English winger suffered a knock during the game and was seen hobbling out of Old Trafford post the game on Monday night.

He is set to be tested at their Carrington training base during the week to assess the extent of the injury ahead of their crucial match against top four contenders Tottenham.

Young has become a crucial player for Louis van Gaal in recent weeks with the manager using him either as a wing-back or a traditional winger. The former Watford player, who has been criticised in the past for his performances, is one of United's most improved players this season.

The 29-year-old wide man has made some key contributions in recent weeks, the latest being the 89<sup>th minute winner against Newcastle United which kept United's quest for a place in the top four intact.

The report claims that his recent improvements have impressed the manager and the club's hierarchy who are now ready to offer him a new long-term deal to remain at Old Trafford for the foreseeable future.

Van Gaal is a big fan of Young and was effluent in his praise for the England international. He also claimed that the player's best position was at wing-back, where he has featured regularly this season in the absence of Luke Shaw.

"He is a player who wants to perform what you say. I think he fits good in my profile," Van Gaal said.

"We have played also with wing-backs and I think that is his best position. Now I use him as a winger and he does a very good job. I am pleased with him," the Dutch manager added.