It is too early to tell the extent of Trent Cotchin's hamstring injury suffered on Friday night, according to Richmond coach Damien Hardwick.

The Tigers skipper left the field midway through the first term of the soggy MCG contest against Collingwood and spent the last 10 minutes of the quarter on the interchange bench.

After the quarter-time huddle, Cotchin embraced coach Damien Hardwick with a hug before returning to the bench and removing his playing jumper and replacing it with a Tigers jacket. 

Hardwick said the Tigers are hoping he has avoided any serious damage, in what was the only sour point of their strong win over the Magpies.

"It's disappointing, he's got a little bit of a tweak. We're not too sure of the extent of it, but it's his support leg when he was kicking. We're hoping it will be on the minor side but once again he's had the two incidents this year," Hardwick said post-game.

"It's disappointing to lose players, and Collingwood lost a couple too, so losing players this time of the year is always tough." 

Hardwick said it was too early to tell if Cotchin will feature again before September. 

"I'm not too sure. We don't know the significance of the injury," he said. 

Hardwick's comments followed those by Richmond football boss Neil Balme, who ruled out Cotchin for next week's clash with Melbourne. 

"(It's) not too bad," Balme said during the game.

"I think he'll miss a bit."