Manchester United will only consider selling record signing Angel di Maria if the unsettled winger asks to leave the club.

Di Maria capped a miserable first season in the Barclays Premier League by limping off with a hamstring injury after only 20 minutes or so of United’s 0-0 draw at Hull City on Sunday.

The Argentinian has not proved to be value for money since his £60million transfer from Real Madrid last summer, scoring only four goals in a debut campaign that began promisingly but tailed off.

Angel di Maria has had a torrid first season at Manchester United and could look to leave the club

The 27-year-old limped off during United's goalless draw with Hull City at the KC Stadium

However, United manager Louis van Gaal is not keen to write the 27-year-old off just yet and believes he can be integrated in to United system if he gets a decent pre-season under his belt after this summer’s Copa America tournament in Chile.

French giants PSG are interested in Di Maria — as they were a year ago — but United sources have indicated that it would take an extraordinary offer or a specific request from the player to leave for them to enter negotiations.

Di Maria and his wife and young daughter have endured a difficult year in Manchester, with the family home targeted by burglars on one occasion. It is this personal unhappiness that continues to present the greatest threat to Di Maria remaining in Manchester for the long-term.

United manager Van Gaal, who began his summer holiday on Monday, has already informed a small group of players they are no longer required at United with the likes of Jonny Evans, Nani, Rafael de Silva and Anders Lindegaard effectively up for sale. Midfielder Tom Cleverley is out of contract and expected to move to Aston Villa, Everton or Tottenham.

Ilkay Gundogan (right) is believed to be a top target for United in the summer transfer window

In terms of incoming players, United retain a very strong interest in the Borussia Dortmund midfielder Ilkay Gundogan and have an option to meet the £35m buy-out clause of Valencia’s Argentinian defender Nicolas Otamendi.

Eugenio Lopez, Otamendi’s agent, said on Monday: ‘Nicolas told the club one month ago that he wants to leave Valencia in the summer. Nicolas is comfortable with Valencia and the fans but wants an upgrade professionally.

‘Nico will do everything possible to get out.There are many conversations with several clubs who want to Otamendi. There is no pre-contract signed with any club.’