A fortnight ago the Canterbury Bulldogs left jaws on floors as they drowned their sorrows following a disappointing 2018 season. The players were filmed and photographed naked while in the beer garden of Sydney pub The Harbour View Hotel.

Photos of stars' bare backsides littered the press in what was described as one of the most poorly thought out Mad Mondays seen in years.

But they may have just been trumped.

Three Tasmanian footy players have put themselves well and truly in the firing line after wearing blackface at their club's Mad Monday shindig.

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One of the players, Beau Grundy, posted a photo of himself and two teammates dressed up as tennis sisters Venus and Serena Williams and Kenyan-born Swans defender Aliir Aliir.

The photo was uploaded on a Mad Monday group on Facebook where club footballers around the country share their end of season costumes.

"William(s) sisters and Aliir Aliir," Mr Grundy posted before uploading the photo as his profile picture.

The post came days after Herald Sun cartoonist Mark Knight was scrutinised internationally for a "racist" cartoon of Serena Williams following her shocking US Open outburst during her loss to Naomi Osaka.