Soderling/Nadal animosity. Does anyone understand?

[veroniquem]

Nadal and Söderling were seen practicing together in the beginning of the year and both were in great spirits, enjoying the training sessions.

The animosity is probably exaggerated.

I think they're OK now but a few years back Rafa was asked on French TV which player he would NOT want to play doubles with and he answered "Soderling". To the question, which player would he want to play doubles with, he answered: "Federer".