Matthew Knox undergoing second trial at Manchester United

Manchester United have invited Scottish club Livingston starlet Matthew Knox for a second trial after he impressed during his first stint last season. The Reds are evaluating whether to sign the young forward on a permanent basis by giving him a chance to train with the first-team during his weeklong stint.

The 16-year-old who was the club's youngest ever player to make a professional debut last season is hoping to impress Jose Mourinho and the Red Devils' coaching staff at their Carrington training base and earn himself a permanent deal.

Knox has been on the radar of a number of clubs since making his debut against St Mirren last December. Apart from having a trial with United in January, he has also spent time with Liverpool, Tottenham Hotspur, Everton and Scottish side Rangers. The Daily Record understands that Livingston have turned down a number of bids from the latter during the summer.

The Livingston forward was expected to join Wayne Rooney, Zlatan Ibrahimovic and Paul Pogba among others for a training session with the Daily Mail reporting that the 20-time English champions are plotting a move with £150,000 ($198,000) said to be the fee on offer.

"Matthew left on Sunday. That's why he didn't play in the game on Saturday against Stenhousemuir," Livingston manager David Hopkin said, as quoted by the Manchester Evening News.

"He will be down there until Friday. Man United asked him to go back down again which is obviously great for him. He'll be training for the whole week and he's got a bounce game with the first team today, which is terrific.

"It's a great honour for him to be training with the team and be invited down again. He must have done something to impress him last time. He's handled everything great here and he's a real talent. We'll find out towards the end of the week exactly what's happening, but it's all positive for him," he added.