BNP Paribas WTA Finals: Singapore 2014 - Day Seven [Getty Images]

SINGAPORE - OCTOBER 26: Serena Williams of USA serves to Simona Halep of Romania in the final during day seven of the BNP Paribas WTA Finals tennis at the Singapore Sports Hub on October 26, 2014 in Singapore. (Photo by Julian Finney/Getty Images)

Getty Images Sport Julian Finney