Finn Russell was the victim of what has been described as an "utterly senseless" incident in the Top 14 play-off match between Racing 92 and Stade Francais.
Stade Francais flanker Marcos Kremer was shown a red card just five minutes into the game for a reckless clearout. Remarkably, it was the Argentina international's third red card in 16 matches this season.
Russell left the field immediately for a HIA after taking a huge blow to the head as Kremer tried to clear him out of a ruck by ploughing his shoulder into his head.
