ADELAIDE comeback kid Trent Hentschel will be sidelined for around a month with a knee injury.

Hentschel, 26, made his long-awaited return to AFL football against Collingwood in round one after missing two full seasons recovering from a major knee injury. He now requires further surgery.

He kicked his first official goal in 949 days in the 32-point loss to St Kilda on Friday night but spent the second half on the bench after experiencing swelling in the joint.

On Monday, Crows’ senior medical officer Dr Andrew Potter said Hentschel would undergo an arthroscopy to remove debris from the joint.

“There is no obvious structural damage to the knee. But Trent visited his surgeon this morning and he recommended they inspect the joint and remove any debris that may be there,” Dr Potter said.

Hentschel’s injury opens the door for enigmatic forward Nick Gill, who finished with 25 possessions and four goals for North Adelaide in the SANFL on Saturday.