The Real Madrid striker inspired France to a 3-0 victory over Sweden with a thrilling double strike that took his tournament tally to six goals, drawing him level with Argentina superstar Messi in the race to finish as the competition's leading scorer.
The prolific forward also moved to 18 World Cup goals in 18 matches, leaving him just one behind Messi's all-time tournament record of 19, as France booked a last-16 showdown with Paraguay on Saturday.
"(Mbappe) is an amazing player, of course," a dejected Gyokeres told reporters.
"I don't need to say something to him. I think he knows it and he's done this for a lot of years now, and he shows it here again.
"He's an incredible player."
The Arsenal striker admitted Sweden struggled to contain France's fluid attack after making a bright start.
"I think we defended well for a while, and then of course after a while it's difficult to keep it like that for 90 minutes," he said.
"(France) rotate with a lot of players. They come in different positions. They're not static, they know each other well, how they move and the connection between each other.
"Of course when they have that quality and that movement it's gonna be tough."
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