Brazil legend Zico has claimed that Neymar must show 'more professionalism' in order to match Lionel Messi and Cristiano Ronaldo.

While Neymar, the world's most expensive player, has long been regarded as one of the best talents in the sport, it is perceived that he is yet to reach the heights of Messi and Ronaldo.

Although Zico has talked up the ability of his compatriot, he feels that the 28-year-old must show more maturity in order to fulfil his potential.

Speaking to Gazzetta dello Sport, Zico said: "I really like Ney, his way of playing is incredible. But he has to be more professional like Ronaldo and Messi, who live for football.

"Ney has too many thoughts that distract him. I spoke to him recently and asked him to be more professional. He is 28 years old now and there is a good team at PSG. They can win the Champions League. It will depend on his quality throughout the tournament, not just for one match. Now Ney has more experience and maturity."

Neymar, who is being heavily linked with a return to Barcelona, has contributed 69 goals from 78 appearances for PSG since August 2017.