DOHA: Dinara Safina's dream of becoming the first Russian to end the year as world number one was left in tatters on Wednesday when her aching body finally gave out at the WTA Championships.The 23-year-old, who arrived in Doha ahead of 11-times grand slam champion Serena Williams in the rankings, managed just two games in her opening round-robin match against Serbia's Jelena Jankovic before a lower back injury flared up and she was forced to quit