The 31 year-old Swede, who is part of Mayweather’s Money Team, makes the first defense of the title he ripped away from Anthony Dirrell just over a year after suffering a damaging first round KO defeat to Derek Edwards in 2014.
Jack is now firmly back in the world class picture and wants to prove his worth by making it third time unlucky for British-born Groves. ‘The Saint’ has already been stopped in two world title fights against compatriot Carl Froch recently and Jack says he wants to add another early reverse to the Londoner’s record.
“Groves is a pretty good fighter. I definitely think it’s going to be an exciting fight. I know he’s coming to get what’s mine and he’s coming to fight,” said Jack.
“He’s fought in the UK in front of a lot of people, but it’s a different stage in Vegas.
“I think I’m the overall better fighter. He’s going to try to knock me out and I’m going to try to knock him out. It’s going to be a great fight. I’m definitely going for the knockout.
“It’s a dream come true to be part of such a big event at MGM Grand for Floyd’s last fight, it’s a blessing,” he added.
The fight is part of a four-fight PPV offering televised on US TV network Showtime on September 12, alongside a super featherweight world title rematch between Rocky Martinez and Orlando Salido and Ishe Smith v Vanes Martirosyan at super welterweight.