Victoria Azarenka, the 19-year-old from Belarus, thrashed world number one Serena Williams 6-3 6-1 to win the Sony Ericsson Open in Miami, Florida, on Saturday. Williams, heavily strapped on her left thigh, never looked fully mobile and was comfortably beaten in 71 minutes by one of the rising talents in the women's game. The victory, the first top-tier triumph for Azarenka, stopped the American claiming a record sixth title at Key Biscayne. It was clear from the outset Williams was not 100 per cent fit. "I'm not one to make excuses, I just want to give Victoria credit today, that's all I can say," she said at the award ceremony. Azarenka, who will move up to eighth in the new world rankings, was nervous as she served for the match, producing a double-fault and allowing Williams break point.