Antero Niittymaki was drafted by Philadelphia in 1998. ((Jim McIsaac/Getty Images))

The Philadelphia Flyers announced on Monday that backup goaltender Antero Niittymaki could miss the beginning of the regular season after undergoing hip surgery.

General manager Paul Holmgren said the goaltender would be out four to six weeks after undergoing a procedure on his left hip to drain fluid.

Niittymaki went 12-9-2 with a shutout and a 2.91 goals-against average last season. His save percentage was .901. 

He is 47-53-17 with a 3.08 GAA and three shutouts in his career.

Niittymaki, 28, was a late addition to the 2006 Finland's Olympic squad after Calgary Flames netminder Miikka Kiprusoff elected not to play due to injury.

He earned Olympic tournament MVP honours after going 5-1-0 with a 1.34 GAA and .951 save percentage, helping Finland take the silver medal.

It isn't the first time the netminder has encountered hip problems. He underwent surgery to repair a torn labrum in his left hip in late 2006.

Niittymaki was selected by Philadelphia in the sixth round of the 1998 NHL entry draft.