Asahi Beer signs deal with Kei Nishikori • The semifinals at the Dubai Championships are set. Karolina Pliskova beat Lucie Safarova 3-6, 7-6, 6-1 to advance to her second straight Premier semifinal and third of the year. She'll face Garbine Muguruza, who beat Carla Suarez Navarro 6-7, 6-3, 6-3. The other semifinal features top seed Simona Halep, who avenged her Australian Open loss to Ekaterina Makarova with a 6-3, 1-6, 7-5 win. She'll play Caroline Wozniacki, who beat Flavia Pennetta 7-5. 6-0.