William Carvalho wants to prove to Manchester United manager David Moyes that he's good enough for the first team at Old Trafford, reports The Daily Mail.
The Red Devils boss is reportedly interested in the player's signature, however appears reluctant to meet his £37.1 million buyout clause.
It was only recently reported that, Carvalho, who has been dubbed the 'new Vieira', is being paid just £4,000-a-month at current club Sporting Lisbon.
And, despite Sporting ready to offer him an improved deal, it appears that he would be ready to jump ship to Manchester United.
Manchester United boss David Moyes is expected to make a number of signings this summer, however it remains to be seen as to whether he will step up his interest in the highly rated midfielder.
Manchester United fans will certainly be hoping for a busy summer window after suffering a nightmare campaign this season.
The Premier League champions look set to miss out on Champions League qualification, with the club currently sitting 11 points behind rivals Liverpool who occupy fourth spot.