Irrelevant stat

Nice job, but you really can't compare serve preparation times of big servers (like Federer in that match) and baseliners (like Nadal in that match). So it is hardly surprising that Nadal took more time to prepare for his serve, mainly because after those long rallys in Nadal's service games BOTH players needed more time to recover between serves. That's also why none of his opponents will ever complain, because they don't mind getting some extra seconds.