The Brumbies have extended their lead on top of Super Rugby's Australian conference with a 20-3 victory over the Cheetahs.

The Queensland Reds struggles in Super Rugby have continued, beaten 18-17 by the Lions at Suncorp Stadium.

Waratahs forward Jacques Potgieter has received a $20,000 fine, half of which is suspended, for making homophobic slurs in Sunday's Super Rugby clash with the Brumbies.