Leinster lost 23-21 to Scarlets in Wales on Saturday evening.
Leinster had led at half-time, 14-10, thanks to a James Lowe try shortly before the break which was converted by Ross Byrne. The score came about after some slick play between scrum-half Jamison Gibson-Park and out-half Byrne.
As Lowe went over in the corner, Scarlets scrum-half Gareth Davies slid in to challenge the New Zealander.
The manner in which he did so drew criticism from Luke Fitzgerald and Donncha O'Callaghan on eir Sport's coverage of the game.
"I just think that's such a dirty bit of play there. They [officials] missed that badly," said Fitzgerald.
He needs to be going in here with his upper body, it's a bad shot.
It's almost like a slide tackle in football, but you've no danger of getting hurt if you're sliding in [with your knees] but you have with your upper body. There's no bravery involved. I hate it.
It was a point with which O'Callaghan agreed.
"Gareth Davies lunging in with his knees, it's something we're starting to see an awful lot more with people scoring tries."
"There is no bravery involved in that. I hate it" @lukefitz11 & @docallaghan4 were unhappy with the slide from Gareth Davies as James Lowe scored on the stroke of half-time. #GuinnessPRO14 #SCAvLEI pic.twitter.com/2R5qa2ljvo
— eir Sport (@eirSport) September 8, 2018
