Florian Wirtz hit the bar with a great free-kick in the first half, though a player with his price tag simply has to do more in big games.
Sport users rated the performances of Liverpool and Arsenal players after the opportunity to submit ratings closed, with average scores reflecting public submissions.
David Raya made a good clearance after a ball was played through the Arsenal defence in the first half.
Declan Rice emerged as Arsenal's best player during the match, providing the assist for Havertz's goal.
Koumas entered the match as an 82nd-minute substitute for Wirtz, brought on to add some energy.
Florian Wirtz: Hit the bar with a great free-kick in the first half, but a player with his price tag simply has to do more in big games.
Here's how we rated the Liverpool and Arsenal players, and your scores are below.
After the opportunity to rate players has closed, the score displayed represents the average from all the submissions by Sport users.
Declan Rice: The midfielder provided the assist for Havertz's goal and was Arsenal's best player.
Koumas (on 82, Wirtz): Thrown on to add some energy.