Milos Raonic advances to 4th round at Miami Open

Canada's Milos Raonic moved into the fourth round at the Miami Open stopping American Jack Sock 7-6 (3), 6-4, while Serena Williams' 20-match winning streak at Key Biscayne ended Monday with a 6-7 (3), 6-1, 6-2 loss to Svetlana Kuznetsova.