Wenger will leave Arsenal at the end of the season after 22 years at the club.
And before his Arsenal side faced Manchester United, Ferguson gave Wenger a gift in tribute.
Wenger then posed for pictures with Mourinho and Ferguson before former Arsenal ace Alexis Sanchez shook his hand.
The Frenchman is known for his great rivalries with both Ferguson and Mourinho over his Arsenal reign.
But when asked about United’s presentation after the match, Wenger was grateful for the gift.
“It was very nice and classy,” he said.
“I enjoyed it. I have come here for a long long time.
“Next year, someone else will be in the dug-out and it will be a hostile environment again.”
Mourinho also spoke about the surprise pre-game incident, saying: “I think we did it fantastically well as a club.
“It would mean more for Sir Alex to do it.
“I only played Mr Wenger three or four times as United manager.”
In the match itself, Arsenal lost their sixth consecutive away game as Marouane Fellaini scored with a stoppage-time header.
And Mourinho felt his side deserved the victory.
”I think if it was a draw it wouldn’t be unfair,” he said.
“Arsenal did a good game, they defended well, but we were the team that tried to win that created a few more chances. But that is normal. We were a bit lucky to score, but we were stronger in the last 20 minutes.
“We won three points that kill the Champions League story. But we still need four points to finish second which is what we want.”