Cape Town - Modiri Marumo is a major injury concern for Polokwane City ahead of their Premiership clash against Maritzburg United at the Old Peter Mokaba Stadium on Saturday night. Rise and Shine's star goalkeeper has a back problem and faces a late fitness test.The Limpopo-based outfit were brought back down to earth in midweek when they suffered a 5-1 home humbling at the hands of University of Pretoria, ending a seven-game unbeaten run that saw them win the Q-Innovation Quarter Two prize.However, coach Kosta Papic admits his squad is heavily jaded after playing six matches in three weeks."My players are very tired after playing many games in such a short space of time and they are trying to adapt to my system," he said. "They have done very well so far and credit to them."But to be honest, I'm not sure what kind of a performance to expect. Hopefully it will bring a positive result and we can end the year on a high."Papic did warn that Maritzburg will be formidable opponents, adding: "We'll try our best to come back after that defeat to Tuks, but it won't be easy against very tough opponents. If you look at the table you will see how well they have done. It's going to be difficult."The Team of Choice, meanwhile, lost their last game when they were beaten 2-1 at home to Mamelodi Sundowns, but are sixth on the table.Coach Steve Komphela will have to do without the suspended Khumbulani Banda, while Mohammed Awal is doubtful after injuring his leg in midweek. Mohammed Anas is also ruled out after hurting himself two weeks ago.