Agar may have to field a side without Motu Tony at Wembley

Hull FC full-back Motu Tony could miss the club's Challenge Cup final clash against St Helens on Saturday.

Tony, who is hoping to line-up for Samoa in the World Cup, aggravated a knee injury against Harlequins.

Hull head coach Richard Agar told BBC Look North: "Our biggest concern is Motu Tony who had a recurrence of a knee injury.

"The grains of sand are falling and Motu's going to have a job getting onto the training pitch."

There is better news for the cup final squad from Matt Sing who is expected to recover from a leg injury.

Agar said: "He strained his quad in training but Singy will be fine."

Half-back Richard Horne has a feint chance of making the Wembley team after recovering from a career-threatening neck injury.