Darren Lehmann was in decent touch before injuring his hamstring at Adelaide Oval © Getty Images

Darren Lehmann could miss the next six weeks of South Australia's season after suffering a hamstring injury in the Twenty20 victory over Queensland at Adelaide on Wednesday night.

Lehmann retired hurt on 26 and scans today showed a grade two strain, which is expected to rule him out of the state's next two rounds of games. A South Australia spokeswoman said Lehmann would undergo rehabilitation for the next four to six weeks.

The injury is a severe blow for South Australia, who are last on the Pura and FR cup tables and also missed reaching the final of the Twenty20 tournament. Lehmann has been a crucial performer for the Redbacks with 378 Pura Cup runs at 42 in five matches and 273 one-day runs at 68.25.

South Australia's selectors were forced to restructure their squads for the fixtures against Western Australia in Perth next week following injuries to Lehmann and Cameron Borgas. Graham Manou has been promoted to captain for the one-day game on Wednesday in a 13-man squad that includes Jason Borgas, the older brother of Cameron Borgas, Ben Cameron and James Smith, an 18-year-old batsman from West Torrens.

Cameron, Jason Borgas, Tom Plant and Ryan Harris have also been named in the Pura Cup squad, which will be led by Matthew Elliott, to play the Warriors from January 19. Shaun Tait has been picked in both outfits after recovering from a hamstring strain.

South Australia FR Cup squad Matthew Elliott, Daniel Harris, Mark Cosgrove, Jason Borgas, James Smith, Ben Cameron, Graham Manou (capt, wk), Ken Skewes, Nathan Adcock, Jason Gillespie, Ryan Harris, Dan Cullen, Shaun Tait.

South Australia Pura Cup squad Matthew Elliott (capt), Tom Plant, Mark Cosgrove, Daniel Harris, Jason Borgas, Ben Cameron, Shane Deitz (wk), Ryan Harris, Jason Gillespie, Dan Cullen, Paul Rofe, Cullen Bailey, Shaun Tait.