The capital club needed a late Edinson Cavani brace to rescue a point against Guingamp five days earlier and could not build on a first-half opener from the same man at Stade de la Licorne.
And Spanish media Don Balon say Neymar is ready to accept a move to United if it means getting out of the Parc des Princes.
PSG coach Unai Emery admitted Thursday he had not spoken to Neymar for "some weeks", as the striker stayed at his coastal mansion in Rio.
Neymar will travel to Paris on Friday to complete the final stage of his recovery from foot surgery, according to Brazilian media reports.
"It is true that there was a problem at that time with Neymar", Cavani told RMC Sport.
"He needs to be left alone to work with the physios, but we also want him to be with us for the last match".
Di Maria has seen things change at PSG since Neymar's arrival from Barcelona last summer, and he believes that his Brazil teammate has had a significant and positive impact on Ligue 1.
"However, I told him there was a condition and that was that he must put the squad's collective objectives first". If I have team-mates who can win individual accolades, then I will do everything to help them. Gradually, we have come to an understanding.
Brazil worldwide Neymar is still aiming to return to action by May 17, meaning he could feature in the final match of the season at Caen.
He also has commercial obligations to fulfil before the end of the campaign.