by Rob Woollard Agence France Presse LOS ANGELES, United States — Floyd Mayweather and Conor McGregor lit the touchpaper for their cross-combat superfight here Tuesday, turning the air blue in an expletive-laden face-to-face meeting to launch their global promotional tour for the bout. More than 11,000 fans crowded into Los Angeles’s Staples Center for a raucous first live showdown between former boxing world champion Mayweather and Irishman McGregor, one of the biggest stars of mixed […]