Frances Tiafoe celebrates profitable first set in Sydney on Friday.
Frances Tiafoe and Tomas Machac forward of their United Cup match.
Petra Kvitova in motion on Friday.
Petra Kvitova celebrates her victory in Sydney.
Matteo Berrettini competes for Team Italy on Friday in Brisbane.
Maria Sakkari secures victory for Team Greece in Perth.
Photo Credit: TENNIS AUSTRALIA