Lincoln McCarthy will spend a second weekend on the sidelines after suffering another minor injury setback.

The small forward missed the Cats' win over the Crows at the Adelaide Oval due to an ankle injury he picked up in the previous round's victory over West Coast.

The ankle problem has settled down, but McCarthy is now carrying another niggle.

"Unfortunately, in a football session over the weekend he strained his hip flexor," Cats physio Mark Young said on the round nine episode of nib Medical Room.

"It's a low-grade strain. We don't think it will take him long.

"But he's a short-term rehab at this point."

McCarthy has kicked seven goals this season, returning from a foot injury that kept him out of football in 2015.

Key defender Jake Kolodjashnij had a plate inserted in his hand after fracturing it while tackling at training last week.

The surgery was successful and he is not expected to be out for more than a couple of weeks.

Youngster Nakia Cockatoo had a lateral ligament pinned down and repaired in surgery last week after being injured against West Coast.

He is expected to be out for up to two months.

The Cats will wait and see how Tom Lonergan pulls up after being taken out of the game against Adelaide early with concussion.