My stopwatch timing of Nadal/Djokovic Madrid SF: 43 minutes of actual tennis! (Tennis Channel just re aired it so I timed it!) When I recorded it, I simply pressed the pause version after every serve and it took up 55 minutes. However, my finger wasn't accurate as I though (I tended to have 2-3 seconds of extra stuff at the end of each point). So this time I stop watch timed it and it came out to 43 minutes. Amazing!