Wigan led on a goal by Hugo Rodallega in the first half but was no match for the quartet of Dimitar Berbatov, Wayne Rooney, Cristiano Ronaldo and Tevez as United pressed to overturn the deficit.
The winning goal, though, came from midfielder Michael Carrick.
United fans at the Wigan game chanted Tevez's name.
"He is a fantastic little player," United manager Sir Alex Ferguson said. "He knows I want him to stay. I had a chat with him today, [United chief executive] David Gill had some meetings today and I'm sure it's progressed further."