Six Nations referee Luke Pearce has been widely praised for his handling of a potentially dangerous incident during the Italy v Scotland match.
Pearce halted the match immediately with Scotland closing in on the Italian line after spotting Italy's Ignacio Brex had taken a heavy blow to the head.
The Englishman blew his whistle and ordered Brex to take a knee to settle himself after he was knocked to the turf at a ruck.
