It seems like most players shave before a match. Sampras always seemed clean shaven during matches, but doesn't really seem to care nowadays. I don't think I've seen a picture of Federer with much stubble in a match. Same goes for Nadal. Is it strictly because of a heat issue that people don't grow beards and play? That'd be awesome to see on Federer! I don't think Nadal has the follicles. I think Safin just isn't the same without facial hair.