Gennady Golovkin has sent a mocking message to Daniel Jacobs after the American insisted he was ready to 'dance' with 'GGG'.
The middleweight world champion has been ordered to defend his WBA belt against Jacobs after Saturday's fifth round stoppage win over Kell Brook.
Jacobs fought a day beforehand, halting Sergio Mora in the seventh round, and the WBA mandatory challenger called for a clash with Golovkin in his post-fight interview.
The New Yorker has since reiterated his challenge on Twitter, writing: "I said it yesterday and I'm saying it again. @GGGBoxing let's dance good boy. #MyTurn"
But Golovkin was unimpressed with Jacob's brash behaviour and told him to back up his boasts by agreeing a fight.
He tweeted back: "Then you should already start practising, and while you are dancing, do not forget to practise signing contracts."
Golovkin holds the WBA 'Super', WBC and IBF belts and has also expressed his desire to fight Billy Joe Saunders, the WBO champion.
But the unbeaten 34-year-old Kazakh is expected to face Jacobs first before a possible unification clash with Saunders.