Instead, it was an all-too-familiar feeling for the departing Arsenal manager.
The Belgian midfielder's stoppage-time header to secure a 2-1 win over Arsenal yesterday only underlined what an important option he is for Mourinho.
But Marouane Fellaini had other ideas and grabbed a late victor to steal the three points as Wenger left Manchester, possibly for the last time as a manager, empty handed.
With three matches remaining in the league against Brighton, West Ham and Watford, the Old Trafford club are on course to finish with their highest points total since the 2010/11 season - Sir Alex Ferguson's final campaign in charge of the club.
In his programme notes Mourinho called for Wenger to receive the "respect he deserves" but that did not prevent some relatively amiable ribbing from the home fans.
"I don't know [how he is]", United manager José Mourinho said. "It is very classy from them", Wenger offered after the game, jokingly adding, "When you're not a danger any more, people love you". Mourinho then shook his hand warmly. To say immediately change me is because he couldn't play. "We (might) have still a big match waiting for us".
City beat West Ham 4-1 and is in sight of a slew of records.
Lukaku was hurt by a challenge from Arsenal debutant Konstantinos Mavropanos and replaced by Marcus Rashford.
"The players are destroyed because they gave everything and were caught in the final minute. It made the Premier League". But there are three more weeks until the final, so let's see.