GARY ‘Spike’ O’Sullivan has again vowed to end David Lemieux’s career.

The Cork middleweight meets the Canadian in the main support bout on the Gennady Golovkin versus Canelo Alvarez undercard at a sold-out T-Mobile Arena in Las Vegas on Saturday night.

O’Sullivan, who was switching from his usual orthodox stance to southpaw in last evening’s media warm up with his coach Paschal Collins in a makeshift ring at the 20,000 capacity Arena, insists he has nothing against the Montreal native.

“It’s just business, nothing personal. On Saturday night, David Lemieux, the last fight of his career. He’ll never box again,” said O’Sullivan who received a warm hug from ring legend Oscar De La Hoya, who promotes the Leesider, entering the venue.

Lemieux, who was brutally relieved of his IBF title by Golovkin at New York’s Madison Square Garden in 2015, was a shambles in his WBO defeat to Billy Joe Saunders, who beat O’Sullivan in 2013, in his native Canada last year, according to O’Sullivan.

“It was embarrassing for him against Billy Joe, I was at ringside for that fight. He (Lemieux) looked terrible. He’s getting knocked out, 100%.

“I’m looking for the winner of Golovkin or Canelo. That’s the reason I’m here, to destroy Lemieux. He is strong and has fought top competition.

“But I will put pressure on him he won’t be able to handle for long. I think Antoine Douglas would easily beat Lemieux. He’d frustrate him and be too fast for him, and you saw what I was able to do to Douglas.”