Former Port Adelaide midfielder Kane Cornes has slammed Richmond star Alex Rance, for what he claims to be one of the worst dives he's ever seen.

During a marking contest in the third quarter, Shaun McKernan appeared to have gotten the better of Rance, before the umpire gave the four-time All-Australian a free kick for a push in the back.

Cornes wasn't pleased with Rance's efforts, and said the umpires should not have been sucked in by such a poor, blatant attempt at a dive.

โ€œAlex Ranceโ€™s one on the weekend was as poor as Iโ€™ve seen,โ€ Cornes told SEN Breakfast on Monday morning.

โ€œI thought it was just a really ordinary attempt at milking a free kick, and unfortunately the umpire was gullible enough to be sucked in by it.

โ€œNow it didnโ€™t have any influence on the game but can you imagine if it was a big game and an umpire overturned a decision like that, it could be a two goal turnaround.

โ€œHe (Rance) needs to have a serious think about what heโ€™s doing and the legacy he wants to leave because we know what a star player he is.

โ€œBut itโ€™s almost like his career will have this little stein on it because of these five or six incidents that heโ€™s had over the last three years."