Mikel Arteta scored the only goal from the penalty spot in the second half and Oxlade-Chamberlain, one of five players to sign new deals at Arsenal this week, believes manager Arsene Wenger has got the mix right.
"The players that we've got here now, there's some really exciting young players," Oxlade-Chamberlain told Sky Sports 3 after being named man of the match.
"I think it's a good mix of youth and experience. The future does look bright for us."
Oxlade-Chamberlain praised Wigan for their attacking approach despite being in the bottom three.
He said: "They set up with a lot of men in midfield. In the first half it was hard to get to grips with their midfield at times."