Gruff Rees has admitted that Ian Evans may have been "a bit reckless" in an incident that saw him sent off for Ospreys in the Heineken Cup last night.

The Wales international is facing a ban which could rule him out of the Six Nations championship after appearing to stamp on Leinster forward Mike McCarthy.

The club's backs coach told Sky Sports News: "It was a big moment, but I'm not sure about it to be honest, like a lot of observers, I think. Perhaps it was a bit reckless, but there were a lot of replays needed to make a decision, which suggests it wasn't that clear and obvious.

"It took five or six times in slow-mo to isolate the incident. I don't know if that's clear and obvious from a red card point of view, and it changes the game.

"You have to be absolutely certain with a red card, and that there were so many replays and there are still so many differing opinions on it suggests that the clips may not have been totally conclusive."

The 29-year-old faces a disciplinary hearing next week.