There's some... unspoken tension in Spanish tennis. On one side, we have the Madrid-centric Spanish Tennis Federation and a few players (Verdasco, Feli Lopez), against the majority of Mediterranean players (Nadal, Ferrer, Robredo, Moyà, JCF...).
It exploded last year when Madrid was chosen for the Davis Cup SFs against the judgement of most players, especially Nadal. It was argued that a drier, high altitude court would benefit the big-serving Americans.
After that decision was made, the president of the Spanish Tennis Federation sent some mocking text messages to the complaining players, causing a pretty big scandal that ruined his career (Nadal & co. pretty much asked for his head).
The real power of Spanish tennis has historically been in the Mediterranean, but Madrid holds the political power, and now they want to become bigger tennistically too. It's a precarious power balance.