David de Gea
de Gea stopped Lukaku's penalty on Saturday as United sealed a first FA Cup final in 12 years. Getty

Manchester United midfielder Ander Herrera insists David de Gea is happy at the club after hailing him the "number one goalkeeper in the world" after his FA Cup heroics.

De Gea saved a second-half penalty from Everton's Romelu Lukaku before Herrera came off the bench to set up Anthony Martial's winner in his side's thrilling semi-final win over Roberto Martinez's side at Wembley on Saturday 23 April.

"He is the number one in the world. In England you know that but in the rest of the world they think they have better goalkeepers, but I don't think so. When we win titles or trophies I think he will be more recognised," Herrera said, Goal reported.

"He has a special talent. When you are born with that quality and ability, you are so lucky. The rest of the humans, we have to work more. You have to work harder. But what I like about him is that he is very calm, he has his feet on the ground. He doesn't change when it comes to these kind of games so I think he is number one of Spain and in the world and he is my friend so I am very happy for him."

Things could have been very different for both De Gea and United after he almost joined Real Madrid on the final day of the summer transfer window, only for the move to collapse at the final hurdle. De Gea went onto sign a new four-year deal with the Premier League side days later.

The Spanish giants are likely to rekindle that interest but Herrera is confident his fellow countryman will remain in Manchester. "I think he is very happy in Manchester United. You can see that. If you are not happy in one place you cannot play like that, so it's easy to say that.

"We can be calm and optimistic, first because he is in a fantastic club and if we start winning trophies, it's easier to keep world-class players."