[iWigan are the current Challenge Cup holders[/i
HOLDERS HANDED CRUSADERS TIE
[iWigan will begin their defence of the Carnegie Challenge Cup against newly-formed Wrexham club North Wales Crusaders next month.
The Warriors will have home advantage against the Championship One club, who are coached by former Wales boss Clive Griffiths, on the weekend of April 13-15.
Wigan head coach Shaun Wane, who was assistant to Michael Maguire when the Warriors lifted the trophy at Wembley last August, was pleased to see his side paired with third-tier opposition.
"I'm quite happy with that," he said.
"We'll give them the respect they deserve but it could have been a lot worse."
Crusaders, formed from the ashes of the old Super League club at the Racecourse Ground, knocked out leading French club Toulouse in the third round in Wrexham on Saturday.
Chief executive Jamie Thomas described the task facing his club as "an Everest of a challenge".
He added: "I don't think anyone would expect us to go to Wigan and even get close to them but our boys will give them everything.
"The one thing that has seen this club through to this stage is its heart and that will be what we take to the DW Stadium next month."
Last year's runners-up Leeds, the reigning Super League champions, will be at home to Wakefield in one of four all-Super League ties.
Wakefield boss Richard Agar admits his side could have their work cut out against the Rhinos.
"It's a tough draw," he said.
"We're playing a side who are used to finding their ways to finals.
"But we're travelling alright at the moment. We're finding our feet and learning how to win games but we will have to be very much at our best."
The other top-flight clashes see St Helens, who gained a hat-trick of cup final victories from 2006 to 2008, take on former cup kings Widnes at the Stobart Stadium, Hull KR will host Catalan Dragons and Huddersfield will go to Hull FC.
St Helens captain Paul Wellens admits his side will feel at home at Widnes, with whom they shared the Stobart Stadium until moving to Langtree Park this year.
"It's going to be fantastic," he said.
"There will be a packed house at the Stobart.
"We would have liked a home draw but this is the next best thing for us, seeing as we spent the whole of last season there."
There will be another derby at Featherstone, who host top-flight neighbours Castleford, while six all-Championship ties will guarantee plenty of non-Super League representation in the last 16.[/i
Full fourth-round draw:
London Broncos v Dewsbury.
Widnes v St Helens
Leeds v Wakefield
Whitehaven v Salford
Featherstone v Castleford
Hull FC v Huddersfield
Wigan v North Wales Crusaders
Swinton v Gateshead
Hull KR v Catalan Dragons
Bradford v Doncaster
South Wales Scorpions v Halifax
York v Sheffield Eagles
Keighley v Warrington
Leigh v Rochdale
Oldham v Barrow
Hunslet v Batley
[iTies to be played on the weekend of April 13-15.[/i