I actually thought it was the return that let him down the most this time. Normally, he handles the Roddick serve better than he did Mayer's yesterday. Plus, a lot of free points for Mayer only compounded the problem of not being able to take control of rallies. I also think Flo played an outstanding match, with incredible variety, and would give Marin (and many other top players) all sorts of problems even at his best. But it's still a disappointing performance, first such that I can remember in any slam
