Jota scored the second goal shortly after half-time before later hurting his knee as he challenged for a loose ball with Gunners goalkeeper Aaron Ramsdale.
Klopp said: “The situation is not easy and Diogo went off and he got a proper knock against his knee.
“They went knee to knee I think and we have to see how quickly that develops, in the right direction hopefully. Hopefully it's nothing serious. It would be very important."
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