Lyon is set to undergo scans to determine the extent of the injury, but there are concerns that he may have re-aggravated the same tear that he suffered in 2010.
The injury happened in the first half of the All-Stars clash at Skilled Park, and Lyon limped off, playing no further part in the match.
Lyon admits that he faces a nervous wait today to find out the extent of the injury, and he was in clear discomfort after the game, which does not bode well.
“It’s a bit concerning, but to be honest I don’t really know [how bad it is],” he said.
“I just sort of tweaked it. It doesn’t feel too bad.”
The catalyst behind the Sea Eagles attack was injured twice in 2010, after he suffered a tear in his ankle in Rd 12, that saw him miss Origin II and III.
Should Lyon miss the start of the season, it will be another blow to the club, with Steve Matai and Glenn Stewart already set to miss the start of the year due to suspension, as a result of offences from last year, with the players coming back in Round five and Round Three respectively.
Lyon will not have a lot of time to repair the injury or train, depending on the severity of the injury, with the Sea Eagles only playing one more trial.