He does not have a mental block. Mental giants like Nadal don't get those.
Bullshit. Weren't you whining that Rafa's results dropped in 2009 because his parents got a divorce? Some mental giant he is. And everyone gets affected by losses, emotional guys like Federer, fighters like Ferrer, even ice men like Borg. Like Nole_fan says, Nadal has insecurities and he is no machine, neither physically nor mentally.