Speaking on Sky Sports, Carragher said, "He gets the penalties and he is involved in the Enzo Fernandez goal as well. People fear when he has the ball. He hasn't been playing for the best team. When you look at Chelsea over the years, you look at flair players you look at Gianfranco Zola and Eden Hazard.
"He has probably done more than Zola already in his 18 months at the club. He is going to go down as one of the biggest players for Chelsea if he keeps doing what he is doing. He is a very special player, and that's not just in the Premier League it is in Europe and world football as well."