Heading into Saturday night's spectacle against Conor McGregor, Floyd Mayweather Jr. is no stranger to megafights. Two years ago, he won a dream bout over Manny Pacquaio by unanimous decision.

For all the hype accompanying the match, fans left underwhelmed. According to CompuBox, Pacquiao landed just 9 percent of his jabs and 19 percent of his total punches. 

Mayweather typically wins in boringly efficient fashion, but he and McGregor have nevertheless managed to captivate a vast audience with loud pre-fight promotion. 

That didn't stop the undefeated boxer—the one who has actually boxed—from reminding everyone that all the talking doesn't matter:

Pacquiao responded with a tweet he has since deleted. Several observers captured the retort beforehand:

Sick burn by Pacquiao, who pointed out how he lost a fight because Mayweather successfully avoided getting hit. 

[Twitter, h/t theScore]