The bout against unbeaten Chisora, 27, was originally scheduled for December but was postponed when Ukrainian Klitschko tore an abdominal muscle.

BBC: Wladimir Klitschko and Dereck Chisora

The Englishman was set to make his return at Gleneagles this week, almost two months after tearing an abdominal muscle at the US Open in June.

BBC: SPORT | Golf | Injured Howell a doubt for USPGA

The padded shorts help protect the freshman from "hip pointers, " a dreaded injury to the iliac crest of the pelvis that can cause the abdominal muscle to bleed.

CNN: March Madness, this year with more padding

The tour of South Africa has already been hit by injuries to skipper Ricky Ponting (abdominal muscle strain), all-rounder Andrew Symonds (hip flexor strain) and Stuart Clark (rib bruising).

BBC: SPORT | Cricket | International Teams | Australia | McGrath pulls out of SA Test tour

The 29-year-old Jennings played in only eight games for the Packers in 2012, plus two in the playoffs, because of a torn lower abdominal muscle and finished with a career-low 366 yards receiving with an average of 10.2 yards per catch, also his worst NFL total.

NPR: Vikings Agree To Terms With WR Greg Jennings