Reports has it that understands that United have withheld £360,000 from Di Maria's pay following the player's decision not to board a plane to San Jose to meet his team-mates during their recent US pre-season tour.
The 27-year-old was due to join up with the club on July 25 following his delayed summer break after Copa America duty with Argentina.
But after United manager Louis van Gaal admitted he did not know why Di Maria had not caught his flight as planned, talks quickly gained pace regarding an exit from Old Trafford just one year after his British-record £59.7 million arrival from Real Madrid.
PSG boss Laurent Blanc confirmed on Wednesday, following his club's 2-0 victory over United in the International Champions Cup in Chicago, that discussions with Di Maria were nearing a positive conclusion.
"You know negotiations are [ongoing] and as Paris St Germain [and United] are both big clubs, that can be difficult. But we feel we are close to the end," Blanc told a press conference.
A deal worth a reported £44m is expected to be completed in the coming days.
Di Maria recorded only 32 appearances in all competitions for United in 2014-15 including eight as a substitute, and started just one of the club's final 10 fixtures.
