“Man, much respect to Floyd Senior still getting a few rounds in at the gym. I hope I can still train at that age. Respect,” wrote UFC multi-division champion Conor McGregor, who recently took to Instagram to fire a shot at undefeated former pound-for-pound king Floyd Mayweather, adding even more fuel to the speculation that the highly-anticipated cross-sport mega-fight will indeed be finalized for an August 26 date.