Nick Kyrgios has refused a challenge from Aussie compatriot Bernard Tomic as they engaged in a bitter spat.
The pair took to Instagram and exchanged barbs while the 29-year-old made a proposal to the Australian Open doubles champion. "At the end of the day, talk is cheap," Tomic told the Sydney Morning Herald.
"I'm ready to make it 2-0 whenever you want. Put your money where your mouth is. Let the public decide who is better. I'll beat you anywhere, any place. If not, shut your mouth and go back to playing doubles."
