Rafael Nadal refused to be drawn on Tuesday over any potential meeting between players in Shanghai this week to discuss the punishing demands of the tennis schedule.
America's Andy Roddick said on Monday that Shanghai Masters no-shows from Novak Djokovic and Roger Federer were stark evidence of the toll put on players by heavy playing commitments.
It followed comments from Britain's Andy Murray last month that he had held several talks with other players at the US Open and they would be discussing the issue in Shanghai.
"There is something there, but is not the right moment to talk about it, especially when nothing clear is done," Nadal said.
"Always is better to talk about the things when you know exactly what's going to happen and when you know exactly what we are going to do," he added.
But the Spanish world number two said there was broad agreement among players over the issue.
"I am in touch always with the rest of the players. You know, I talked a lot with a lot of players last month. We'll see what we can do."
"The important thing is that, yes, I can say because I'm sure we are, most of us, almost everyone, in the same way. So like this we have power. Now we'll have to keep finding what we really want for the future and make that happen if possible."
Roddick, speaking on Monday, said the issue had to be addressed.
Referring to the absences from Shanghai of world number one Djokovic and 16-time Grand Slam winner Federer, he said: "Obviously, if they were feeling well and they weren't worn down, then they would (play).
"We're not getting away with anything by pulling out of tournaments. I feel like that's the way it's presented sometimes. That's just not the case," he added.
Roddick said players were still fired up over the issue and insisted Federer and Djokovic were "only a phone call away" but he was unsure what would happen in Shanghai.
The sport's administrators claim the players are to blame for the heavy schedule because they voted for current dates and point to changes such as allowing the top eight seeds byes into the second rounds of tournaments.