Richmond captain Katie Brennan is unlikely to play again this season due to the ongoing effects of concussion.

Meanwhile, premiership contenders Melbourne have had another player, this time defender Sarah Lampard, rupture their ACL.

Katie Brennan. Credit:Getty Images

Brennan has not played since suffering a concussion in the Tigers' round four loss to Geelong where she was taken high by Jordan Ivey. She has missed two games since.

The 27-year-old has been forced to spend hours in a dark room for most of the time since that hit and was still having adverse symptoms late last week.