Huddersfield, twice finalists in recent years, were the Super League side to suffer the biggest scare in yesterday's Challenge Cup ties.
The Giants trailed 18-10 to Batley until the Championship team had Dane Manning, the scorer of their first try, sent off.
With the bonus of a one-man advantage, Huddersfield were able to come home safely 28-18, with David Hodgson and Leroy Cudjoe scoring their clinching tries. Their reward now is a fifth-round tie against Catalan Dragons, who struggled before prevailing 22-16 at Leigh on Friday night.
Holders Warrington will be at home to Swinton of Championship 1 after hammering Keighley 80-0. Swinton, the lowliest team still in the competition, got through by beating Dewsbury 44-38 on a day when plenty of points were scored.
A derby between Wakefield and Castleford will be a highlight of the round. Wakefield won 50-10 at Doncaster, while Cas thrashed Rochdale 72-10.
Wigan qualified to meet Bradford in the other televised tie by swamping Barrow 52-0.
Coach Michael Maguire felt his side did a professional job as they crushed the minnows. "Satisfied is probably the best word to use," he said. "It was a professional game played by our players.
"We knew we were going to respect the opposition and I thought we did that by the way we defended our line and managed to put some good tries on."
Salford beat Hunslet 68-2 and will meet Hull KR, 64-22 victors at York, in another all-Super League tie. Leeds did not have things their own way, despite beating Crusaders 30-20 on Saturday. They will be hosting an outpost club again in the shape of Harlequins, who were far too good for Gateshead this weekend.
Other match-ups pit St Helens against Featherstone Rovers and Widnes against Hull, who put 82 points on Oldham.
There is only a short gap before the next round, with the ties to be played on the weekend of 20-22 May.
Scores, Digest, page 21