SINGAPORE - DECEMBER 01:  Ana Ivanovic of the Indian Aces takes on the roll of stewardess as she  serves drinks to Serena Williams and Daniela Hantuchova of the Singapore Slammers on a private jet from Manila to Singapore  prior to the Coca-Cola International Premier Tennis League at the Singapore Sports Hub on December 1, 2014 in Singapore, .  (Photo by Clive Brunskill/Getty Images for IPTL 2014)