All matches rained out in Houston Challenger

   Today's scheduled matches in the $162,480 Houston Challenger were postponed by rain.
   The third round and quarterfinals are set for Friday, when the forecast calls for sunny weather with a high of 61 degrees (16.1 Celsius).
   Qualifier CiCi Bellis, a 20-year-old San Francisco Bay Area product, will face third-seeded Kirsten Flipkens, a 33-year-old Belgian, at 8 a.m. PST (live stream).
   Bellis is playing in her first tournament in 19 months. During her layoff, the right-hander underwent three operations on her right wrist and one on her right elbow.
   Flipkens, a Wimbledon semifinalist in 2013, outlasted Bellis 4-6, 6-1, 6-4 in the first round at Indian Wells in 2017 in their only previous meeting.
   Second seed and defending champion Bradley Klahn, a 29-year-old Stanford graduate, will meet 14th-seeded Michael Mmoh, 21, of Bradenton, Fla., at about 10 a.m. Klahn leads the head-to-head series 2-0, both three-setters in 2017.
   Mmoh has won seven consecutive matches, including the title in last week's $54,160 Knoxville Challenger, since being defaulted from his second-round match in Charlottesville for throwing his racket and hitting a line judge.
   Thirteenth-seeded Jenson Brooksby, 19, of Carmichael in the Sacramento area will take on fourth-seeded Marcos Giron of Thousand Oaks in the Los Angeles region for the first time at about noon.