World middleweight champion ­Gennady Golovkin confirmed his status as the most devastating finisher in boxing in Los Angeles on Saturday, demolishing American challenger Dominic Wade inside two rounds to score his 22nd consecutive knockout. The 34-year-old Kazakh star is aiming to become the biggest draw in boxing following the retirements in the past year of Floyd Mayweather and Manny Pacquiao, and Saturday's spectacular win only enhances his box office appeal.