Former world No. 7 Nicole Vaidisova won her first match on the WTA tour in four years at the Miami Open by defeating Timea Babos, 6-1, 7-6 (4). On Friday, she lost to world No. 3 Simona Halep, 6-4, 2-6, 6-1. The 25-year-old began playing again last September on the