BRISBANE, AUSTRALIA - APRIL 04: ALex Fasolo of the Magpies kicks during the round one AFL match between the Brisbane Lions and Collingwood Magpies at The Gabba on April 4, 2015 in Brisbane, Australia. (Photo by Chris Hyde/Getty Images)

The AFL has given Collingwood forward Alex Fasolo a "formal warning" after urinating into a cup while sitting on the bench during the Magpies' NAB Challenge match against Geelong last Friday.

However, the AFL said that any player caught doing the same thing in the future will sanctioned.

"It was the AFL's position that, in any future occurrence, visiting players should use the nearby Geelong VFL rooms in the Ford Stand and while a warning was sufficient, any repeat conduct would be subject to a sanction," the league said in a statement.