Mainz (AP) - Bundesliga soccer club FSV Mainz 05 has to do without its national player Pierre Kunde Malong for a long time.

The Cameroonian underwent an operation on his right knee joint in Munich on Tuesday and, depending on the healing process, is expected to be out for four to six weeks, the Rheinhessen announced.

The 25-year-old was injured in training before the lost DFB Cup second-round game against VfL Bochum last week.