The Uruguayan made his first United start against Istanbul Basaksehir last week but made a profound impact in the comeback at Southampton on Sunday, assisting Bruno Fernandes and scoring twice to inspire United to a 3-2 victory from 2-0 down after coming on at half-time.
Mata, 32, is approaching the seventh anniversary of his move to United and the one-year option in his contract could be triggered to tie him to the club until 2022. Herrera arrived at United five months after Mata and played with Cavani for eight months at PSG before the Ligue 1 club’s record goalscorer left on a free.
Free Manchester United newsletter
Manchester United secured a dramatic comeback victory at Southampton on Sunday, largely thanks to Edinson Cavani’s two goals off the bench.
Bruno Fernandes’ goal set Ole Gunnar Solskjaer’s side on course to battle back from 2-0 down at St Mary’s, giving United a third successive Premier League win.
MEN Sport will bring you all the reaction and analysis from United’s win at Southampton and build-up to their Champions League clash with PSG in midweek. You can have it all delivered straight to your inbox by signing up to our daily newsletter. Just put your email address in the sign-up box at the top of this article, or simply follow this link. It’s free and only takes a few seconds.
“Ander, who played with him at PSG, called me and told me: ‘I think Edinson is going to go to your club, you will see he’s a top guy, a top professional. And I know you will help him,'” Mata told L’Equipe.
“So since Edison has arrived, I try to answer the questions he has about the club or the dressing room. I can help to translate when he wants to communicate with people in the club, in the staff.
“And since he’s here, as Ander said, I can see how focused he is, his professionalism. Edinson has done a lot of things in football and he remains very humble. And it’s great to have him. He brings his experience, he will bring a lot of goals.
“Did I advise him to buy umbrellas? Yes, as a joke. I told him that it rains much more in Manchester than in Paris. So actually it’s not a bad advice.
“We (Mata and Herrera) speak a lot, but our relationship is above that. We’ve had a great connection for a long a time, since we were playing together in the Spanish Under-21s.
“He’s a great guy, we had a nice time together in Manchester. After the game at Parc des Princes, we had a nice chat together in the tunnel.”
Herrera, 31, could start for PSG on his first return to Old Trafford in the Champions League on Wednesday night after spending five years with United, where he won three trophies and was voted the Sir Matt Busby Player of the Year for 2016-17.
United need a point to qualify for the round-of-16 and are three points clear of PSG in Group H.