He suffered an ankle injury while playing in the Napoles challenger, and it's thought that he's not going to return to the courts until 2008.
He doesn't have any physical issues that affect his game in the court. Nevertheless, he does a lot of mood troubles and lack of confidence that in fact, affeect his game to the point that his is thinking in retirement. Check out this link to find out more ESPNdeportes.com - ¿Gaudio se retira? "Está muy difícil continuar así"
now there is a tight battle between federer and nadal...but i think federer;s epoque is nearly over. nadal is much younger, and in time he can get so skilled that noone will be able to defeat him