Serena Williams rolls in win
Updated: October 25, 2012, 4:41 PM ET
ISTANBUL -- Serena Williams extended her dominance over the top-ranked player in the world on Thursday, defeating Victoria Azarenka 6-4, 6-4 at the WTA Championships.
Williams improved to 11-1 overall against Azarenka, winning the last nine matches. Williams beat Azarenka in the semifinals of Wimbledon and at the London Olympics.
More:Serena Williams controls Victoria Azarenka again in WTA Championships in Istanbul - ESPN
