Casemiro admits they and their families have become close over the two years they've had together.
“Bruno is a very sharp player,” Casemiro said.
“From any space the opposition provide, he'll find a ball to assist a team-mate. He's one of the sharpest players towards goal I've played with in my career.
“He doesn't need two touches to put a player through on goal. He's a player who creates a lot of opportunities, I think he's one of the sharpest players I've known in my career.”
He also told manutd.com: “Even though Bruno speaks numerous languages – Spanish, Portuguese, English and Italian – I'm privileged to speak the same first language as him, Portuguese. Therefore we are close.
“Bruno is a friend, someone who has helped me a lot here since the start. I'm very thankful for Bruno on and off the pitch.
“On the pitch we all know Bruno, an extraordinary player and off the pitch he's a friend. Our daughters are in the same class at school together.
“It's a pleasure to have such friends on and off the pitch, and I'm so pleased he's at United. He's a brilliant player and a great person who helps us a great deal.”