Boxing champ Klitschko wary of Nigerian threat

World IBF and WBO heavyweight champion Wladimir Klitschko takes on challenger Samuel Peter today and admits he is wary, having already been put on the canvas by the Nigerian.

"Peter can hit and when he connects, then it's not good," said Klitschko ahead of the bout in Frankfurt.

Klitschko was put down three times when the pair last met in Atlantic City in September 2005 but survived the onslaught to earn a unanimous decision over 12 rounds. "It was one of the most difficult and important fights, a milestone in my career," the champ said.