The Uruguay international scored four times - including a 20-minute first-half hat-trick - and provided an assist as the Reds swept aside Norwich 5-1 at Anfield.
"Sheer brilliance that was. Technically we were very good but to witness that was a remarkable individual performance," he said.
"I always like to talk about the team but I think you have to hold up Luis as one of the best strikers in the world. Incredible performance.
"I think he is the happiest he has been here. He flies all around the world but I think this club suits him perfectly and I still think his best years are going to be here.
"The profile of the club, the connection with the supporters, you can see it is a hand-in-glove fit for him.
"The type of football we are trying to play allows him to operate in those spaces but you still have to be there to finish it off and that must have been a joy to watch for people.
"The modern-day world-class operators - the Ronaldos and Messis - it is all about the numbers and what they produce and it is not any more one and two, or two and three (goals).
"I think if you look at Messi and Ronaldo they have been out on their own for a couple of years.
"Luis is only 26 and I think he will make improvements to his game over the coming years."
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