Three second-half goals saw Latics beaten in their first home run-out of pre-season as Wigan came from behind to win at Boundary Park.
Hallam Hope had put John Sheridan’s side in front during an impressive first-half display but with a number of changes for both teams after the re-start, it was the visitors who ultimately came out on top.
Sheridan will be pleased with the confidence and creativity shown by his players during the opening hour as preparations for the new season step up a further level.
Hope put Latics in front on 21 minutes, stooping to head in from close range after darting into the box before flicking the ball over goalkeeper Ben Amos.
Sheridan’s side had deserved their goal, applying an increased amount of pressure as the first half progressed and working their way into good areas.
Hope put in a good shift during his 45 minutes on the pitch, combining to good effect with Chris Porter in a way that worked the Wigan back-line well.
The visitors went close in the opening stages, Josh Magennis shooting wide after cutting in from the left, but Oldham became the more productive side as the half went on.
Having put Latics in front, Hope then drew a good save from Ben Amos only for the assistant’s flag to be raised, while Jack Stobbs regularly worked his way into good areas down the left, creating a chance which Luke Burgess sent over.
After five changes for the home side at the break and a further six during the early part of the second period, the momentum of the game shifted in Wigan’s favour.
Among those substitutes was Junior Luamba, who exchanged passes with Mike Fondop as Latics began the second half with intent, before his header from the resulting corner was deflected wide.
But with a number of introductions of their own, the quality of the Championship side began to tell. After a period of pressure from the visitors, James McClean scored an equaliser with an angled finish past Jayson Leutwiler.
McClean then turned provider for Callum Lang, on his return to Boundary Park, to put the visitors in front from close range and Curtis Tilt added a third from a corner.
Oldham Athletic: Norman (Leitwiler 46), Francis-Angol (Couto 71), Hogan (Vaughan 60), McGahey (Sutton 46), Stobbs, Porter (Trialist B), Burgess (Da Silva 73), Hope (Luamba 46), Sheron, Windass (Kilner 66), Trialist A (Fondop).
Attendance: 1,150 (204 away).