Rafael Nadal disagreed with coach Carlos Moya following a warning which was sent to Roger Federer and Novak Djokovic.
Moya told Nadal’s two biggest rivals that the Spaniard had yet to reach his peak following success at the US Open.
“I believe that Rafa Nadal has not reached the ceiling, there have been timely tournaments and matches in which he has played at his highest level,” Moya told SER radio.
“But there is still room for improvement and to be more regular. We will continue working on it, so no one doubts.”
Those comments were put to Nadal by SER radio – but the world No 2 was not singing from the same hymn sheet.
“I think that the ceiling we have touched,” Nadal responded.
“That I can continue to improve is something I work for every day.
“I will train with the illusion of being better, go to train to go to train I do not conceive.
“I conceive to train with the illusion to improve things and that has always been the ultimate goal.”
Nadal won his 19th Grand Slam title by beating Daniil Medvedev in an epic five-set US Open title on Sunday.
The 33-year-old is now just one major tournament win behind Federer’s record.
But before returning to action alongside the Swiss star at the Laver Cup next weekend, Nadal wants to first watch ack his clash with Medvedev.
“Yes, I want to see it again, it is a game to watch,” he added.
“I think that apart from all there were many high-level points and very exciting moments.
“It is one of those games that I suppose at some point, when I am more mentally recovered and can analyse things better, it is a match that I would like to see.”