The AFL has backed the Review Centre for not overturning a controversial Collingwood goal late in the fourth quarter of Saturday's preliminary final.

Magpies forward Josh Thomas' kick appeared to be touched by GWS' Lachie Keeffe after his finger bent back during the replay.

Now 'silently' revising all scores, the Review Centre did not intervene with the umpire's ruling despite strong evidence that they should have.

The AFL has admitted that while the ball appeared to be touched by Keeffe, the reviewer made the right call.

The decision has been highly scrutinised around AFL circles.

โ€œTo me that looked like Lachie Keeffeโ€™s finger had bent back,โ€ former Geelong captain Cameron Ling toldย Channel 7.

SEN's Gerard Whateley went so far to say it was aย โ€œcatastrophic failure of a diabolical review systemโ€.

โ€œThat decision is an absolute disgraceโ€ฆ weโ€™ve got a review system for a reason, everybody could see that was a behind,โ€ Nathan Brown said onย Triple M.

Reviewers are only supposed to overturn decisions if they are 100 per cent confident.