Williams survives Pironkova test as Azarenka impresses
Serena Williams was forced to dig deep to secure a 4-6 6-3 6-2 US Open quarter-final victory over the unseeded Tsvetana Pironkova, keeping alive her latest bid for a record-tying 24th grand slam singles title, but she next faces an awesome Victoria Azarenka, who steamrolled Elise Mertens 6-0 6-1.
Tennis
• 10 Sep 20