Gold Coast key forward Ben King has suffered a suspected knee injury at training, sparking concerns for the young gun's start to the season.

King was pictured requiring medical attention on Thursday, having suffered an injury to his leg after a marking contest.

7 News' Mitchell Kroehn revealed via social media that King left training after clutching his right knee.

King has been an influential asset to the Suns in recent years, booting 89 goals from his 53 games with the Queensland club, with the tall forward now set to for scans this afternoon.

A significant setback will severely hinder the Suns' hopes for finals this season, with defender Jack Bowes already having been ruled out for an extended period following shoulder surgery.

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“Ben left the field with an injury and was assessed by club medical staff at the time,” GC SUNS General Manager of Football Performance Wayne Campbell said in a club statement.

“Ben will get scans this afternoon and we’ll wait on the results of those before taking any further action.”

The marking contest that injured King is also understood to have hindered top draftee Mac Andrew, who is requiring attention on an ankle complaint.