Richmond coach Damien Hardwick says he has no concerns about the AFL playing future of Graham Polak, who was knocked out last weekend.

Polak was knocked unconscious in a clash of heads playing in the VFL and the incident raised concerns for his wellbeing given he suffered brain injuries when hit by a tram two years ago.

Hardwick said Polak would not play this weekend as a precaution, but had no worries about him returning to the field and pushing for a recall to the AFL side.

"He's playing some reasonable football, he's doing everything we want him to do, he's taking some marks up forward, kicking goals," Hardwick said on Thursday.

"He just needs to get back and play some good football to force his way back into our (AFL) side."

Richmond have turned their season around with three wins from their past four games, but Hardwick said the Tigers wanted to land a big scalp on Sunday, when they play Sydney at the MCG.

"We're coming up against a very good side in the Sydney Swans, an experienced side that probably embarrassed us in round three earlier this year," he said.

"So we're looking to make amends for that this week."

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