They might not be fighting each other in the ring any time soon, but the Twitter sparring that has erupted between boxing pound-for-pound king Floyd Mayweather and Amir Khan has been hugely entertaining.

It looked as if Khan was odds on to face Mayweather on May 3 in Las Vegas, especially after winning a public poll instigated by Mayweather to choose his next opponent. However, Mayweather picked Marcos Maidana instead. Maidana earned the shot by dominating Mayweather-wannabe Adrien Broner in his last fight. Broner had a rematch clause with Maidana, but it looks like Broner’s manager Al Haymon (who also manages Maidana) persuaded him to forego that so Maidana could be free to take the Mayweather fight.

Khan wasn’t too happy with the snub and accused Mayweather on Twitter of “running scared.”

Mayweather stirred the pot even more with the following tweets, suggesting that if Khan and Broner fight on the undercard on May 3, then he would fight Khan—but only if the Englishman prevailed.

Khan did not mince his words in his reply to Mayweather:

Khan gave up a shot at Devon Alexander’s world title belt in December thinking he had landed the big fight against Mayweather. Now, he might just have to consider fighting Broner on the undercard if it places him in the best negotiating position to get at shot at Floyd. In the meantime, Mayweather is having some fun at his expense on social media, and Broner also jumped on that bandwagon with this message for the fighter: “Khan ain’t sh-t!!!!!”