Doesn't seem to be using his usual elastic band shock absorber either. Strange. It's also stenciled with the double line so perhaps he's got an endorsement?
I do like how after they've retired, a lot of these former top pros switch to a completely different racket. Says a lot for Babolat that they seem to be a popular choice for retired pros?
I just find it strange that for some people players who were so picky about their frames and strings (Sampras) during their playing career are far more relaxed when retired.
Then again, perhaps that's not that strange and they're just going where the money is? (And they can pretty much play with anything!) For example, I know I prefer to play with a prestige mid, but if babolat wanted to pay me to use a pure drive I'm sure I could adapt!