With 16 major titles won as the coach of his nephew Rafael Nadal, he was the most successful coach in tennis history until Marián Vajda and his player Novak Djokovic won their 17th major title together in 2020.. Toni Nadal was born into a Spanish family and has two siblings, brothers.

In April 2021, Nadal joined the coaching team of Canadian Félix Auger-Aliassime ahead of the clay-court season.

Nadal required that his pupils show respect for their equipment, and stated that he would immediately stop coaching Rafael if he ever threw his racket out of frustration.

[2] Nadal believes that throwing a tennis racket showed a lack of respect towards people who could not afford the same equipment and the sport itself.

[2] Toni Nadal was the record holder of the most Grand Slam titles won as a coach with 16 until February 2, 2020, when Marián Vajda and Novak Djokovic won their 17th Grand Slam title together in the Australian Open, giving Vajda the sole possession of the top position in the history of tennis.

1 John McEnroe said on BBC Radio 5 Live that the Spanish tennis star should "get a new damn coach".

[9] In December 2016, Rafael added countryman[10] Carlos Moyá, a former world number one player, to work alongside Nadal as his coach.

[10] Nadal was the first one to contact Moyá to see if he would be willing to join Rafael's coaching team,[10] thinking it was the perfect time to include him.

[11] Nadal originally withheld the knowledge of his plans to separate from Rafael, who found out when the news was released to the press.