Tom Jonas is the co-captain of the Port Adelaide Football Club.

He returned to the side against Hawthorn on Saturday after missing five weeks with a calf injury.

Jonas, by his own admission, had a poor game in the 31-point loss to Hawthorn and at times was well beaten by Hawks forward Jack Gunston, who slotted six goals.

Jonas went on The Advertiser's Lowdown podcast and explained his poor game.

He said: "The calf was fine - was I match-fit? No!

"Kenny reckons he has never seen me look so bad running off the ground after 20 minutes.

"I was out on my legs, I think I’ve run twice in the last five weeks."

AFL football is the most demanding sport in the world, and you’ve picked a player who has run twice in the last five weeks.

"I didn’t play my best game, but I'll be better for the run," Jonas explained.

There is no logical reason to think Jonas will be better for the run this week.

He has now run only three times in the last three weeks. That is not enough!

St Kilda have been practising in a hot yoga room for weeks to prepare for the stifling conditions waiting for them in Shanghai.

With Port Adelaide having the bye in the SANFL this week and the Power having the bye in the AFL next week, the only logical management of Jonas is to not select him for the next fortnight and train so he can come back and perform at the level required.

Port Adelaide have options in defence. They don’t need to select underdone players.

At five wins and five losses, Port Adelaide must win this game against a team that is level with them on the ladder.

You cannot take in underdone players, despite the title that accompanies their name.

Hopefully Ken Hinkley has learnt his lesson.