'Certified Killa vs Certified Bitch' - Floyd Mayweather shades Conor McGregor on Instagram

Ever since Floyd Mayweather knocked out Conor McGregor to win his 50th fight, the now-retired boxer and the Irish professional mixed martial artist have been trolling each other on social media.

Here is the latest shade from Mayweather to Conor McGregor.

Certified Killa vs Certified Bitch
A post shared byFloyd Mayweather(@floydmayweather) onFeb 11, 2018 at 1:46am PST