The grudge match between Covington and Masvidal will headline UFC 272 on March 5.
It will be a five-round, non-title contest at the T-Mobile Arena in Las Vegas.
And 'Chaos' has wasted no time in throwing the first verbal jab, taunting 'Gamebred' ahead of their monstrous clash.
Via a text message to MMA journalist Brett Okamoto, the former UFC welterweight interim champion said: "He better f**king show up."
Covington and Masvidal will be looking to return to the win column, with both stars coming off defeats to UFC welterweight champion Kamaru Usman.
Leon Edwards, who was supposed to face Masvidal last year before an injury cancelled the match-up, aimed a dig at Covington vs. Masvidal.
He tweeted: "2 bums coming off losses."
2 bums coming off losses 🤦🏾♂️— Leon 'Rocky' Edwards (@Leon_edwardsmma) January 11, 2022
Covington and Masvidal used to be friends and lived together while they were training at American Top Team.
But their friendship turned sour in 2018, with Covington leaving the gym in 2020.
Covington hasn't fought since November 2021 when he fell short in his bid to become UFC welterweight king.
Masvidal is also coming off a loss to 'The Nigerian Nightmare' having suffered a knockout defeat in his second attempt to claim UFC gold.
Covington and Masvidal will finally settle their differences inside the famed Octagon in what will be one of the biggest grudge matches in UFC history.
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