"I got a knee in my back in the first half and it stiffened up," he said. "I probably should have come off at half time to be honest but I carried on.
"I then fell on my back in the second half and couldn't continue."
"It remains to be seen whether I'm fit to play on Saturday. It normally takes a couple of days to recover from a dead leg but this is a dead back.
"I've never had a dead back before."
