Geelong will be sweating on the fitness of star defender Tom Stewart after suffering a knee complaint during Sunday’s win over St Kilda.

The five-time All-Australian was subbed out during the third term of the 31-point victory.

He had ice applied to his left knee, while he had a compression bandage on his right knee.

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But despite the multiple ailments, the vice-captain appeared unfazed as he watched the remainder of the match on the bench.

Coach Chris Scott said the move was mainly precautionary and they hope he will be fine for next week’s clash against North Melbourne.

“We think it’s fine. I’ve said a few times in this forum we’ve got a low tolerance these days for keeping guys on when they can,” Scott said.

“The question isn’t ‘can they keep going’, it is ‘should they keep going’.

“The strong suggestion is that he’ll be OK for next week and hopefully that’s on the back of chopping him out a little earlier.”

Looking a class above their opponents all day, the Cats won 17.11 (113) to 12.10 (82) in front of a vocal home crowd of 29,985 spectators.

The writing was on the wall early, as Geelong kicked four unanswered goals to start the match, and while the Saints fought back hard to stay in touch in an entertaining end-to-end battle, the home side answered every challenge.

St Kilda’s engine room battled hard throughout, finishing with more clearances and contested possessions than the Cats, but Geelong’s class on the outside proved the difference.

With coaches Ross Lyon and Chris Scott content to let their midfields fight it out without any hard tags, St Kilda Star Nasiah Wanganeen-Milera emerged as the most damaging player on the ground.

The out-of-contract 22-year-old was everywhere for the Saints, using his running power to collect 36 disposals, his smarts around stoppages to win 10 clearances, and his exquisite kicking to snare two goals and set up multiple others.

But while Wanganeen-Milera was clearly the Saints’ best player, the Cats had even contributors across the board.

Max Holmes ran riot through the middle with 32 disposals, while Ollie Dempsey (25 possessions) was outstanding in his 50th game.

Coleman Medal leader Jeremy Cameron had four goals to his name by half-time, with a sublime drop punt from a tight angle the highlight of the match, and added a fifth late in the final term.

But Cameron was far from the only threat in Geelong’s forward half, with Shaun Mannagh kicking three goals from his 24 disposals, and Tyson Stengle, Patrick Dangerfield and Jack Martin each grabbing two.

St Kilda has now lost six games in a row, with their most recent win coming against Melbourne in Round 12 before the Saints’ mid-season bye.

Geelong looks well-placed to finish in the top four for the sixth time in the past seven seasons, with just five home-and-away games left.

The Cats have notched 12 wins and are likely to start favourites in their remaining games against North Melbourne, Port Adelaide, Essendon, Sydney and Richmond, all of whom sit in the bottom half of the ladder.

- With AAP