To play consecutive long tennis matches? To those that keep bringing up the "doping" argument please take note that we are overwhelmed with speculation and not a single shred of evidence. When you uncover that evidence, please share. Until then, please enjoy what these remarkable athletes are doing give credit to the sacrifice and hard work they put in. As far as Lance and cycling goes, it has been known for a long time and confirmed with countless firsthand accounts, worldwide, that most of the peloton was doping. I'm surprised there weren't more blowouts from the trail of used needles and syringes left up and down the French roads.