`` I was n't even sure if I 'd be able to play here Serena Williams retains WTA Finals title . Beats Simona Halep 6-3 6-0 in title match in Singapore . Halep thrashed Williams in round robin match earlier in week . TL;DR
Serena Williams retains WTA Finals title . Beats Simona Halep 6-3 6-0 in title match in Singapore . Halep thrashed Williams in round robin match earlier in week . TL;DR