Serena Williams of the United States crushed Romania's Simona Halep 6-3 6-0 on Sunday to win the WTA Finals championship in Singapore. Williams avenged her loss to Halep in the group stage of the season-ending tournament to claim her fifth WTA championship, tied for second with Steffi Graf. Only Martina Navratilova, with eight titles, has won more. Halep shocked Williams 6-0 6-2 in the group stage of the event but was unable to reproduce that performance in the final as the world number one dictated terms from the outset. (For more sports news and updates, follow AhramOnline Sports on Twitter at@AO_Sportsand on Facebook atAhramOnlineSports.) http://english.ahram.org.eg/News/114004.aspx