MUNICH, Germany, April 29 (UPI) -- Defending champion Philipp Kohlschreiber and fifth-seeded Tommy Haas both withdrew Tuesday from the BMW Open tennis tournament in Germany.
Kohlschreiber, seeded third, pulled out because of a respiratory infection. He was replaced by Julio Silva, who then defeated Matthias Bachinger 3-6, 6-2, 6-3 and advanced to the tournament round of 16.
Haas cited a nagging shoulder injury as his reason for withdrawing. His place in the draw hadn't yet been filled.
Two first-round matches that were rained out Tuesday will open play Wednesday, which will also see the second round begin.