Watch: Challenge Cup sixth-round preview

Tanya Arnold is joined by Luke Robinson and John Kear to look ahead to the sixth round of the Challenge Cup, including Castleford v St Helens.

WATCH MORE: Stefan Ratchford's sublime step for England try

Watch live coverage of Castleford v St Helens this Saturday, 13 May on BBC One, the BBC Sport website & mobile app from 13:45 BST.

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