I don't have the exact figures, but an awful lot of Northern Ireland's goals in the last two years have come from set pieces. Our defence isn't the biggest and I can see the main danger for us being from free kicks and corners where McAuley, Cathcart and Evans can come forward.
Playing James Collins would help us in this regard and, thinking about it, maybe keeping Sam Vokes in the team would make sense from a defensive point of view, but I think the big Northern Irish defenders would be quite happy about having him to deal with, as opposed to someone like Robson-Kanu who would drag them into areas they wouldn't want to go.
Do you think Wales should make a change aimed at nullifying a possible domination at set pieces by Northern Ireland, or should we take the attitude that we go with the same side and let them do the worrying about us?