RICHMOND midfielder Reece Conca is likely to miss the first two months of the season after it was revealed his "high" hamstring injury was worse than first thought.

Conca, who suffered the injury during last Thursday night's NAB Challenge clash against Port Adelaide, has now been ruled out for up to 10 weeks by Tigers medical staff.

Richmond was initially optimistic that the 23-year-old has suffered a standard hamstring injury but last Friday stretched his recovery time to eight weeks.

On Wednesday, physical performance manager Peter Burge said scans had revealed the tendon damage on his right leg had occurred high up, which typically leads to an even longer recovery.

Conca suffered three separate hamstring injuries last season and only managed to play three games.

"Reece has got a hamstring injury high up near the tendon, so it's a longer-term process and (he'll be out for) eight to 10 weeks unfortunately," Burge told the club's website.

"It's on the side that he hasn't hurt before, so we start the rehab process and look forward to getting him back as soon as we can."

Burge said Shane Edwards, who suffered a bruised shoulder and minor nerve damage against the Power, would do non-contact skills training this week and was on track to play in round one.

Midfielder Shaun Grigg, meanwhile, was pushing for a round two return after suffering a thumb injury in the final pre-season game.

"He's got a plate inserted into his thumb and he'll start running later in the week," Burge said.