THE AFL is investigating an incident involving Collingwood's Alex Fasolo in Friday night's NAB Challenge clash with Geelong.

The broadcaster's cameras appeared to capture vision of Fasolo urinating into a cup on the interchange bench in the second quarter of the match.

It is understood the League will take several factors into consideration before determining an outcome.

The Magpies' change rooms are located on the other side of the ground to the bench, meaning Fasolo would have had to have walked around the playing arena to use the toilet.

Even with the renovations being conducted at Simonds Stadium, only Geelong's home rooms are located on the same side of the ground as the interchange bench.

However, the away team has access to Geelong's VFL rooms, which are located in the left forward pocket at the city end of the ground.

Even with the ongoing redevelopment, those facilities were available if needed. But it's believed Collingwood was unaware if it was able to use those rooms or not.

Based on the available vision Fasolo also appeared to do everything possible to be discreet, using a towel to cover himself up.

Former Hawthorn forward Mark Williams was reported for misconduct in 2008, under AFL law 19.2.2, after relieving himself before the start of a VFL match.

Fasolo was one of Collingwood's best players against the Cats, booting a game-high five goals to go with 19 disposals and seven marks.

The AFL is expected to announce a verdict into the inquiry late on Monday or early on Tuesday morning.

Alex Fasolo on the bench at Simonds Stadium during Friday's NAB Challenge game.