Serena Williams teams up with Muchova in Berlin doubles

MUNICH, Germany — US tennis great Serena Williams, on the comeback trail nearly four years after retiring, will partner Czech Karolina Muchova in the doubles at next week's Berlin Open grass court tournament. "We're going to play doubles. I'm pretty excited about it, it doesn't happen every day that such an amazing athlete, not only in tennis but overall in sport asks you to play tennis with her. I hope it's going to be fun," Muchova told a press conference in Berlin on Saturday. Williams,