Harlequins boss Conor O'Shea doesn't believe that James Horwill deserved a red card after his collision with England lock George Kruis.
Horwill was sin-binned after appearing to strike Kruis at a ruck in the first minute of Saturday's Premiership game.
Kruis was knocked out and stretchered off but O'Shea insisted there was no intent to hurt Kruis from his player.
O'Shea also agreed that a red card was the right decision for replacement prop Rhys Gill, after he was red carded for a dangerous tackle on George Lowe.
"A huge turning point was Rhys' sending off, but I don't think you could argue with that," O'Shea said.
"I'm just thankful George Lowe did not suffer anything because we all know what he has been through over the last three years.
"I'm really thankful that there was nothing wrong with George Kruis but when you look at the actual play, James is coming in and he is going to clear a ruck.
"Kruis is going down and there is nothing malicious in it but we have to protect players so we will take the yellow.
"It was a great game of rugby between two teams who will hopefully be fighting it out towards the end of the year."