
Liverpool went on to lose by a 3-2 scoreline, and Jurgen Klopp was left frustrated by the decision to award Arsenal a match-winning penalty during the second half.
However, the German tactician was equally disappointed with the injuries sustained by Diaz and Trent Alexander-Arnold, who needed to be substituted at halftime with an ankle injury.
Speaking at his post-match press conference, Klopp said: "Lucho we had to change before [half-time]. [It's] something with the knee, not good. He will have a scan and then we will know more. I have no idea about the extent and then on top of that Trent is bad as well with the ankle.