Anderson Silva has his next boxing match booked. Silva, the former longtime UFC middleweight champion, will lace up the gloves for a return to the ring against Brazilian MMA fighter Bruno Machado in an exhibition match on May 14, TMZ first reported Thursday before an official announcement followed. According to MMA Fighting , the bout is scheduled for eight rounds to be contested at 194 pounds. The event, which is called “The Global Titans Fight Series,” is headlined by an exhibition bout between Floyd Mayweather and Dan Moore and will take place on a helipad atop the iconic Burj Al Khalifa Hotel in Dubai