23-year-old Palmer has become one of Chelsea's core players, and Blues legend Pat Nevin talks about Palmer's comparison with several historical legendary players.

Newen said: "It was reasonable for us to compare Palmer to Zidane a year ago, but last season there was a clear gap in his performance, and now this comparison may be mentioned again. Palmer is definitely a world-class player and he is still very young. When he recalls the European Cup, many players were attracted much attention, while Palmer was on the bench. I was thinking, 'What is this doing? Why do you do this?' He should be on the court.

"It doesn't matter who is the so-called star player, it's important who can play on the court. I think any team in the world would be very happy to sign Palmer, which is the definition of a world-class player, and Palmer has reached that level. But Ronaldo? Messi? It's not fair to not compare anyone with them. I think Palmer is already very close to the higher level, but he needs to stay high for a long time to achieve that.

"The players around Palmer can help him in the new season, such as Estewan and Gittens, who may be the kind of players who can improve their teammates' performance."