Edinson Cavani showed his class with a respectful touchline exchange with Leeds boss Marcelo Bielsa on Sunday night.
Bielsa is a big fan of the Uruguayan and actually wanted to sign him in the summer but missed out, with the striker going to United.
"Cavani could contribute with his physicality and adapt here, but I've never talked about him with the coach [Bielsa]," Leeds owner Andrea Radrizzani said in July. "Having said that, we've certainly thought about him and we'll see, given he's still available on a free transfer."
Fans spotted the exchange at Old Trafford, with many taking to Twitter to comment on it.
"Cavani and Bielsa having a friendly little chat before second half kick off. Smiles. Second best moment of the game far," wrote one fan.

Another added: "Cavani showing respect to Bielsa."
Cavani has a reputation for being a kind character from his days at Paris Saint-Germain.
An extract from his autobiography; El Matador, by Romain Molina, sums this up.
It reads: "One day, he did a photo shoot for Hugo Boss, who is a partner of PSG," the extract reads. At the end of the shoot, Cavani asks for the reference of a costume he likes. The photographer tells him he can take it, a brand manager confirms it.
"But Cavani refuses, explaining that he earns a lot of money and that he does not need to be given a gift. He just wanted to know the reference to buy the same one.
"He took two and at Hugo Boss, it was the first time we saw a PSG player do that. It's a little trick. But there is only Cavani who does that.

"He used to often go and eat with club employees and not the 'stars'. He used to always talk with the cleaning ladies, with the housekeepers.
"Do you realize that Cavani spent a month in his hometown in Salto while on vacation? In the middle of winter there! It was 7 degrees and he got there by regional bus.
"Six hour drive! When you earn €16million per year, it is not common."
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