http://news.yahoo.com/s/ap/20091028/ap_on_sp_te_ne/ten_wta_championships]Safina pulls out of WTA final, Serena gets No. 1 (AP)[/URL]



AP - Dinara Safina withdrew from WTA Sony Ericsson Championships because of a back injury Wednesday, handing the year-end No. 1 ranking to Serena Williams.