Kirsty Wigglesworth/Associated Press
Several newspapers reports that United are set to make their move for Chelsea midfielder Mata.
Jason Burt of the Daily Telegraph claims that United will offer £37 million for the Spain international, who is concerned about his World Cup place if he cannot find regular first-team football at Stamford Bridge.
Jeremy Cross of the Daily Star claims United will be open to offers for striker Wayne Rooney if they qualify for the Champions League this season.
Robin van Persie has held "clear-the-air" talks with Moyes over his fitness, reports Neil Custis of The Sun (subscription required).
The United medical staff claim the forward is fit to play, but the Dutchman believes he needs more time to recover from a thigh injury, claims the article.
David Anderson of the Daily Mirror says that United's pre-season trip to the United States to mark a new sponsorship deal with Chevrolet will be under threat if the team are involved in qualification rounds for the Europa League.
Meanwhile, winger Wilfried Zaha was "mysteriously" left on the bench for United's reserve team on Monday, reports Alan Nixon of the Daily Mirror.
Juventus are set to beat United to the signing of Sporting Lisbon midfielder William Carvalho, reports James Gheerbrant of the Daily Mirror.