Sorry if this has been discussed elsewhere (and please do point me there, thanks), but does any pro use more than one model of racquets and switch during a match? For instance, switching from Radical to Prestige during a match! We see players getting a new racquet because string breakage, racquet breakage, tension adjustment, etc. But the new stick would be of the same make, model, weight, grip size, and tension (usually), right? Conventional wisdom would probably consider switching to a whole different model during a match total insanity. But has this been done? Thanks.