KEY BISCAYNE – This week, Jon Wertheim handed over the keys to the SI Tennis Mailbag to Andrea Petkovic.u200b The 29-year-old took some time between playing at Indian Wells and this week's Miami Open to answer some reader questions about pressures on the WTA Tour, Maria Sharapova, David Foster Wallace and more.
Andrea, I am a big fan of not only your game, but also your friendly personality. I find it very difficult to root for some of the women tennis players, because they seem to be very standoffish and unfriendly, but you are a breath of fresh air on the tour.