Chelsea skipper John Terry is convinced Belgian attacker Eden Hazard can become as good as Lionel Messi and Cristiano Ronaldo in the nearest future.
The Blues star man was named both the PFA and Football Writers' Association's Player of the Year in England after fine performances in the 2014/15 campaign, helping the west London club win their first Premier League title since 2010.
Mourinho's team also won the Capital One Cup and Terry reckons Hazard isn't far off from the best.
The Daily Star quoted the former England captain Terry saying: "When you look at Ronaldo and Messi and what they've achieved in the game is outstanding.
"But this boy can be right up there with the both of them.
"The best technical player that I have probably played with at Chelsea over the years is Gianfranco Zola - but I think Eden has the potential to be up there with him among the club's greats.
"I was speaking with Franco the other day and he said Eden is unbelievable.
"He believes he will go on to do even bigger and better things."
Terry also heaped praise on Diego Costa who had a fantastic debut season at Stamford Bridge, following his move from Atletico last summer.
He added: "He's a lovely guy really. What you see on the pitch is completely different to what he is like off the pitch.
"Diego is a winner - and he will do anything he can to win.
"I am delighted to have him on out team rather than be against him.
"He has been phenomenal and when you speak to other central defenders in the Premier League, they all say that he is a right handful."