The Sydney Sixers face being without captain Ellyse Perry for the rest of the WBBL group stage after she sustained a shoulder injury against the Melbourne Renegades but are hopeful she will be fit for the finals if the Sixers secure their spot in the knockouts.

Perry landed awkwardly while diving on the boundary during the Renegades' chase on Sunday evening at Drummoyne Oval. Her discomfort was clear but she remained on the field for the rest of the match - which the Renegades won with a Courtney Webb six off the last ball - even though she was largely unable to use her right arm.

She has been diagnosed with a low grade AC injury and will certainly miss the Sixers' next match, against Hobart Hurricanes on Wednesday, before further assessment later in the week when a more precise timeline will become clear with early estimates ranging from one to three weeks on the sidelines.

The best outcome could potentially see Perry available again at the end of the month while the lengthier timescale would push things close to the finals weekend on December 7 and 8.

The Sixers are currently third in the table with 12 points from nine matches. Perry stands as the second-leading run-scorer in competition with 469 at 93.80.