Fremantle forward Hayden Ballantyne will undergo surgery after scans on his left hamstring revealed tendon damage.

Ballantyne suffered the injury in the third quarter of Fremantle’s 21-point win over Carlton at Domain Stadium on Friday night.

He left the ground and took no further part in the game.

Ballantyne had scans on Saturday which were reviewed on Monday by a specialist, who advised that surgery was required.

“At this stage the medical advice is that Hayden will require a rehabilitation phase of eight to 10 weeks,” general manager of football operations Chris Bond said today.

“Once the rehabilitation process is completed and given Hayden’s strong pre-season, we expect him to make a significant contribution on his return to football.”

Meanwhile, Michael Apeness injured his left knee playing for Peel in a practice match against West Perth at the weekend.

The 22-year-old, who suffered a tear in his posterior cruciate ligament, does not require surgery but will wear a brace on his knee and is expected to miss 6-8 weeks.