The Portuguese tactician held a press conference ahead of tomorrow's Serie A clash against Atalanta.
On Tuesday, the Giallorossi released a statement against the so-called Super League.
"Like most coaches, I'm totally against it [the Super League]," Fonseca said in his press conference.
"I must say that at this moment I am very proud to be part of football, which has shown that the fans are those who keep this sport going.
"We have shown that players, footballers and fans are important. I am proud of this stance of all and Roma," he added.
"I am not worried about football's future, we can always improve, but even during tough times, we've always proved this sport can survive."