"They've both trained very confidently this year and Jamo's a confident little man anyway."
Gibson-Park replaced Weepu during the Blues' last-minute loss to the Sharks last weekend and Kirwan was impressed with what he saw. The coach also thought Kerr's kicking game could be a key on Sunday considering the match is being played on the high veldt.
"Leading and driving the game plan around will be their challenge," Kirwan said. "It's really a matter of them getting over the nerves and playing a pretty good game of footy."
Blues v Cheetahs
Bloemfontein on Sunday morning (NZT):
Charles Piutau, Frank Halai, Jackson Willison, Francis Saili, Rene Ranger, Baden Kerr, Jamison Gibson-Park, Peter Saili, Luke Braid, Steven Luatua, Ali Williams (c), Anthony Boric, Angus Ta'avao, James Parsons, Sam Prattley. Reserves: Keven Mealamu, Ofa Tu'ungafasi, Culum Retallick, Brendon O'Connor, Wayne Ngaluafe, Marty McKenzie, George Moala.