Certainly does seem to be a charged relationship between Toni and Nadal:
Rafa Nadal has revealed he was terrified of his uncle when learning to play tennis as a child and he blames Toni for his 'insecurity' growing up.
The world number two, who is a 10-time Grand Slam champion and considered the greatest clay-court player to have ever played the game, has lifted the lid on his tumultuous relationship with his uncle in his new autobiography.
Toni has been instrumental in Nadal's rise to the top of the men's game but their relationship has often been troubled, particularly, the Spaniard revealed, in the early days.
"Toni was tough on me right from the start," Nadal said in his autobiography, which is being serialised in the Telegraph. "If he saw my head was wandering he would belt the ball hard at me … to scare me, to startle me to attention.
"My mother remembers that, as a small child, sometimes I'd come home from training crying. Toni never let up. Once I started playing competitive games, aged seven, it got tougher.
"One very hot day I went to a match without my bottle of water. I'd left it at home. He could have gone and bought me one, but he didn't, so I'd learn to take responsibility."
Nadal also blamed Toni for his early round jitters, which incredibly the French Open champion still suffers from.
"While Toni's refusal to let me off the hook has its value, in that he pushes me always to improve and do better, it can also be bad because he creates insecurity," he said.
"I often feel this way, especially in the early rounds of a tournament, and the truth is that while he deserves credit for so many good things in my career, he also deserves blame for me being more insecure than I ought to be."