Port Adelaide star Robbie Gray has been diagnosed with testicular cancer, the Power announced on Monday.
Gray was diagnosed shortly after the AFL season ended and underwent successful surgery to remove a tumour.
He will undergo a short course of precautionary chemotherapy, but the club expects he will make a full recovery and be ready to start pre-season training in November.
Port Adelaide club doctor Mark Fisher said the surgery was a success but the treatment was still important for the club's three-time best and fairest winner.
"The chemotherapy is a preventive measure to significantly reduce the chance of cancer returning," he said in a club statement.
Power football manager Chris Davies said the club was confident Gray would make a quick recovery and they would do whatever they could to support the 29-year-old.
"We are thankful the surgery went as well as it could have," Davies said.
"The treatment isn't expected to interfere with Robbie's ability to begin pre-season training in November."