The Davis Cup has undergone a huge reform after being taken over by a consortium led by Barcelona defender Gerard Pique.
The international competition was previously played at various stages throughout the regular season but it will take place at the end of the campaign from 2019 – which in turn prolongs the season.
However, Federer is completely against the new format and he has revealed at the Shanghai Masters that he will not give his backing to the new organisers.
“I highly doubt it, of course. We’ll see what happens. I don’t think this was designed for me, anyhow. This was designed for the future generation of players,” Federer said after beating Roberto Bautista Agut this afternoon.
Meanwhile Novak Djokovic, who is also hoping to win the Shanghai Masters this week, is considering stopping representing Serbia at the tournament.
“I am not 100 per cent sure at the moment,” he said.
“I just feel like the date of the Davis Cup is really bad, especially for the top players.
“Between the two, I will prioritise the World Team Cup because that’s a competition of ATP.
“But also I think and I hope that there will be a larger discussion between the players to understand how we are going to approach these two competitions.
“Or hopefully we can make it to the point where we can have one big Super World Cup, if you want to call it that, or whatever it is, because thats the best thing for our sport.
“But the way it seems right now, we are going to have two at the moment.”
Alexander Zverev has also withdraw from the Davis Cup, despite only being 21 years old.
“Because in November I do not want to play tennis anymore,” the world No 5 said.
“I think all the top guys will say the same thing. We have one and a half months off in our season, and that’s end of November and December.
“Making a tournament end of November which is 10 days playing and competing, it’s crazy.
“By the end of the year we are all tired.”