Widnes Vikings coach Denis Betts welcomes back forward Hep Cahill and winger Patrick Ah Van to his initial 19-man squad, following their return to full fitness from respective ankle and knee injuries.

Wigan Warriors are set to give debuts to 18-year-olds Lewis Tierney and Ryan Hampshire in the absence of Sam Tomkins and Matty Smith and have included two other youngsters, George Williams and James Greenwood, in their initial squad. Hooker Logan Tomkins makes his first Super League start of the season in place of Michael McIlorum, one of nine regulars missing through injury.

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