Gamba Osaka defender Oh Jae-suk will be sidelined for three weeks with a hamstring injury, the J. League first-division side announced Wednesday.
The South Korean, who has made 26 league appearances this season, pulled his right hamstring and was substituted in the 72nd minute of Saturday's 1-0 loss at home to Albirex Niigata.
Gamba's third league defeat in a row left them 10th in the 18-team standings.