FUN-LOVING Tom Liberatore's cameo for the Vietnam Swans has earned the ire of the Western Bulldogs.

The premiership-winning midfielder unexpectedly took the field at the weekend while on holidays in the south-east Asian country, reportedly booting a goal and spending some time in the ruck.

"It's not ideal. Hopefully they (the Vietnam Swans) had some good insurance," Bulldogs list manager Jason McCartney joked with Melbourne radio station RSN on Tuesday.

Liberatore, along with travelling companion and Bulldogs teammate Luke Dahlhaus, was named as a emergency in the Vietnam team's AFL Asia Championships campaign.

Dahlhaus stayed on the sidelines, but Liberatore was less eager to occupy the pine.

Liberatore was also snapped drinking beers on the sideline with a odd new haircut - dubbed the 'Friar Tuck' for the lack of hair atop the scalp.

McCartney expressed concern about him playing in the off-season considering the star 24-year-old missed the 2015 season with a ruptured ACL.

"Young Tom shouldn't be doing those things," he said.

"You can't put yourself at risk.

"He loves a good time, but yeah, you probably need to be a touch smarter."

McCartney said the club would make contact with him while he's overseas to tell him "no more footy".