"He's been amazing," Nasri told the Telegraph. "He is the best midfielder in the Premier League, top three in the world.
"You could see how important he is the way he came back [from injury] at Palace - one assist, one goal.
"I'm biased because he's my good friend, but he has everything - power, technique and he even scores free-kicks now.
"It's hard to compare players through different times, but surely he's one of the best since the Premier League began. You can put him in that bracket."