"I don't know [how he is]", United manager José Mourinho said.
Ferguson was Wenger's greatest rival but Mourinho was arguably his most bitter, and a loss like Sunday's would have hurt the Frenchman. I am in unknown territory. Mourinho then shook his hand warmly.
"I want him to stay, the club wants him to stay, I think he will stay, it is almost there", he said.
The Gunners, who are sixth in the Premier League, were pegged back and held to a 1-1 draw by the Spanish side in the first leg at The Emirates last week, despite Atletico Madrid being down to 10 men for most of the game.
"I think next season is a big season for us".
A few weeks ago even Chelsea's own players seemed to have given up hope of Champions League football at Stamford Bridge next season.
Jose Mourinho's side began the second half with a double helping of the "Oh buggers" when they lost Romelu Lukaku to an ankle injury in the 50th minute before conceding an equaliser in the 51st.
Although the United boss is not yet sure of the extent of Lukaku's injury, he said the Belgium global may be unable to make May 19's final against former club Chelsea at Wembley.
When Paul Pogba put the Red Devils in front with an early goal, a chorus of "Arsene Wenger we want you to stay" rang around the stadium.
PFA Young Player of the Year Leroy Sane got City - confirmed as Premier League champions two weeks ago - up and running in the 13th minute as his strike from the edge of the penalty area was deflected in by Patrice Evra. I never, when I finish a game and a player is injured, immediately go for good or bad news.
Second-half goals from Gabriel Jesus and Fernandinho made sure of the win, leaving West Ham three points above the relegation zone in 15th. Aaron Cresswell curled a free kick to reduce the deficit to 2-1 for West Ham, which is three points above the relegation zone with three games left.