Quins face the toughest test of the fifth round, playing hosts to the reigning Super League champions. The Rhinos have been in imperious form so far this season while Quins' fortunes have been more mixed, though their ruthless demolition of Castleford in the last round showcased their attacking capabilities. Leeds coach Brian McClennan has controversially withdrawn Kiwi full-back Brent Webb from the centenary Test against Australia to guarantee his availability, having recently eased injury worries by signing versatile French international Eric Anselme. Home coach Brian McDermott has casualties of his own. Key forwards Daniel Heckenberg and Louie McCarthy-Scarsbrook plus influential full-back Mark McLinden are all long-term absentees while doubts persist over former Australian Test player Scott Hill. Michael Wall