Morgan Knowles could lift rugby league's Challenge Cup at Wembley Stadium this afternoon when St Helens face Castleford Tigers. The Barrovian has been included in Saints' 21-man squad for the Wembley showpiece, which is set to kick off at 3pm. Coach Kristian Woolf has also kept a place for Matty Lees, who returned to action last week following a three-month absence with a broken ankle, while Sione Mata'utia is suspended after picking up a ban against Wakefield. Speaking to the St Helens Star, Woolf said: “This is a Grand Final week – it is different because it is in the middle of the season and in the back of our minds we know when we finish on Saturday we will have to re-focus for the rest of Super League and a lot if games over a short period.