Kilkenny look to have suffered an enormous setback for their All-Ireland senior hurling semi-final showdown against Waterford after corner-back Jackie Tyrrell was reportedly ruled out of the clash due to a stress fracture of the foot.

According to the Irish Independent, Tyrrell twisted his ankle badly during a training session on Saturday. An MRI scan showed up a stress fracture, with the defender now facing at least four weeks on the sidelines.

Tyrrell started in the Leinster final victory over Galway three weeks ago as the Cats swept to their 70th provincial hurling crown with a 1-25 to 2-15 victory.

Shane Prendergast replaced Tyrrell after 50 minutes in that game and now looks set to step into his shoes for the last-four clash against the Deise.

Tyrrell, 32, has seven All-Ireland medals to his name and is one of the stalwarts of Brian Cody’s squad. 

Derek McGrath’s Waterford defeated Dublin by five points at Semple Stadium on Sunday, powering to a 2-21 to 1-19 victory to earn a first All-Ireland semi-final appearance since 2011.