Port Adelaide star Robbie Gray's shock cancer diagnosis

Expecting his first baby later this year, Port Adelaide star Robbie Gray has undergone surgery after a shock testicular cancer diagnosis.

A tumour was discovered shortly after the end of the AFL season, with the 29-year-old having surgery to remove it.

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.

The news follows Melbourne forward Jesse Hogan's testicular cancer diagnosis in May.

Like Gray, Hogan had surgery to remove the tumour but did not have chemotherapy and only missed seven games.

Three-time All Australian Gray and his wife Annabel, who married in January, are expecting their first baby in the coming weeks.

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 him.

"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."