The Sydney Swans say marquee recruit Lance Franklin has no fitness worries ahead of the AFL season despite the $10 million man suffering a suspected seizure in January.

A News Ltd report on Saturday revealed Franklin, who made a high-profile switch from Hawthorn in the off-season, was admitted to hospital in early January.

The Swans confirmed it was a precautionary measure which would have no “ongoing impact on his football”, and that neither drugs nor alcohol were factors in the scare.

Franklin is one of the league’s most damaging forwards, a former Coleman Medallist and his signing with the Swans is considered the coup of the off-season.

He signed a nine-year, $10 million deal with the Swans at the end of last year.

Franklin played in Sydney’s 10.12 (72) to 5.7 (37) loss to West Coast on Thursday, having little impact on a dire night for the Swans.

But club officials are confident there will be no long-term concerns surrounding the 27-year-old’s future.

“This was a minor medical matter and Franklin returned to training after missing just one session,” the club said in a statement released to News Ltd.

“Since then, Franklin has felt no ill-effects as a result.

“This is a private medical matter, and as to avoid any unnecessary speculation, Franklins doctors confirmed that neither alcohol nor drugs played a role.”

The Swans open their season away to cross-town rivals Greater Western Sydney on Saturday March 15.