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SINGAPORE - OCTOBER 29: Simona Halep of Romania speaks with her coach Darren Cahil during a break in her round robin match against Agnieszka Radwanska of Poland during the BNP Paribas WTA Finals at Singapore Sports Hub on October 29, 2015 in Singapore. (Photo by Julian Finney/Getty Images)

SINGAPORE - OCTOBER 29:  Simona Halep of Romania speaks with her coach Darren Cahil during a break in her round robin match against Agnieszka Radwanska of Poland during the BNP Paribas WTA Finals at Singapore Sports Hub on October 29, 2015 in Singapore.  (Photo by Julian Finney/Getty Images)