Hernandez's defense now March 29

Cruiserweight titlist Yoan Pablo Hernandez is suffering from a viral infection, forcing his defense against Pawel Kolodziej and the rest of the card to be postponed for three weeks on Thursday.

Hernandez was due to make his fourth defense against Kolodziej on March 8 at Max-Schmeling-Halle in Berlin. However, it was moved to March 29 and shifted to Berlin's Velodrom, promoter Sauerland Event announced.

"I am really sorry, but it makes no sense to step into the ring when you are not fit to fight," said Hernandez, 29. "Most of all, I am hoping that the fans are not that disappointed and come to support me on March 29 to see a top-notch performance when I am defending my IBF belt."

Hernandez (28-1, 14 KOs), a former standout on the Cuban national amateur team before he defected to Germany, won his title in 2011 by controversial sixth-round technical decision against American Steve Cunningham and then outpointed him in a rematch. Later in 2012, Hernandez outpointed Troy Ross and then, after a lengthy layoff because of surgery to repair a broken hand, stopped Alexander Alekseev in the 10th round on Nov. 23.

Kolodziej (33-0, 18 KOs), 33, of Poland, has built his record against lesser opposition and will be fighting in a world title fight for the first time. He was 3-0 last year, including a seventh-round knockout of Prince Anthony Ikeji in Nov. 23 in Poland.