It was an even start to the contest, with few chances in the opening stages.
That collision left Raya limping, but he was still able to save from Daka to keep Brentford in the contest.
Jamie Vardy was replaced by Patson Daka for Leicester while Pinnock was unable to reappear for the second half for The Bees after a couple of knocks before the interval.
Brentford has no such concern and that could be a factor in this match.
The Bees dominated long periods of the first half but fell behind to sensational strike from Youri Tielemans.
Both teams have enjoyed stellar season's in their respective leagues, with the Foxes currently being marked as title contenders in the top flight whilst Thomas Frank's side are well in the race for the automatic promotion spots in the division below.