The young midfielder is a target for manager Jurgen Klopp and the Reds, given their planned midfield overhaul.
"Khephren's fantastic," the Nice boss told RMC Sport.
"He's very hardworking, very attentive. On rest days he's at the training center. He recovers quickly for back-to-back matches and completes high-intensity training.
“He listens and applies himself. He has room for improvement and he's in demand. He simply eats up video analysis, additional sessions. He also advises others, because he takes on a leadership role. He's also discovering himself as a person.
"He's already in the France team, but I'm convinced that he'll have a very big career. But there must still be a little bit in Nice to go to continue his progress."