Sydney: Nick Kyrgios has returned serve at Bernard Tomic after he accused the Aussie star of faking illness to avoid playing in the Davis Cup tie against the United States.

Nick Kyrgios and Bernard Tomic
Nick Kyrgios and Bernard Tomic

The storm erupted when Tomic was overheard during a match with American John Isner on Sunday questioning Kyrgios's absence from the tie. While in conversation with team captain Lleyton Hewitt, television microphones caught Tomic muttering: "Nick's sitting down in Canberra. Bullshit he's sick."

The fiery Kyrgios took to social media to hit back. He initially made a mild acknowledgement that Tomic's criticisms had been in the "heat of the moment, not gonna take it personally, Indian Wells a week away, plenty of time".

But a matter of minutes later fired back: "Just don't expect me to have your back anytime soon."

He then referred to Tomic's infamous record-quick 28-minute loss to Finn Jarkko Nieminen at the Miami Open. "Let's not forget who holds the quickest loss on the ATP tour."