Fernandes is said to be in 'daily contact' with his former Sporting Lisbon teammate, with whom he apparently shares a great bond.
Raphinha arrived at Elland Road from Stade Rennes last summer for a fee of around £17m.
The Brazilian star featured for Lisbon before Rennes where he teamed up with Bruno. Now, Raphinha has adapted himself totally to English football conditions and has been incredible for Marcelo Bielsa's side.
Raphinha has scored five and assisted five goals in the Premier League this season and has caught the eye of big clubs, especially Manchester United and Liverpool.
Brazilian outlet UOL claim that Fernandes' relationship with Raphinha could prove key should United try and land the 24-year-old.
Moreover, it is also claimed that the duo speak on a daily basis and that the Red Devils have launched an enquiry for Raphinha this summer.
Fernandes spoke to Top Mercato in December 2019 about the player he misses the most from his time Sporting Lisbon and he said, "Raphinha, I miss Raphinha. He’s a player with whom I had a different chemistry from the others. He understood me at a glance. He knew, according to the movement of my body, where I was going to put the ball to him. I also miss him because he brought joy to the locker room. He’s also a responsible and hardworking person.
Incidently, since Raphinha started getting linked with a move to Manchester United, Leeds United's Director of Football Victor Orta has dismissed all speculation.
"To be clear, we have not had any approach for Raphinha and we would not welcome one. It’s only for clickbait and to create business for the websites. We are really happy and we believe he’s a player that’s a substantial part of the project, and more now when there’s still a lot of things to do.” he told BBC West Yorkshire.