Robertson has emerged as one of the Premier League’s leading left-backs during his time at Anfield.
But, even though Silva rates Robertson highly, he doesn’t feel the Liverpool man is as good as Everton’s Lucas Digne.
He said: "Robertson is a very good one also. He is a fantastic boy, a fantastic professional.
"He is our rival but he deserves everything he is achieving in his career but Lucas is Lucas, and Lucas, for me, is the best one because he is our player and playing in our blue shirt.
Digne has been one of Everton’s best signings of the summer this season, with his performances earning plenty of praise.
The Frenchman has looked rock solid in Everton’s defence, but he has also provided a good outlet going forward.
Robertson, meanwhile, has been one of Jurgen Klopp’s side key players as they have made a bid for the Premier League title.