In a huge blow to Northern Ireland's hopes of reaching a first World Cup since 1986, Sunderland defender Dan Ballard has been ruled out of the play-off semi-final in Italy.
A hamstring injury for the Sunderland defender means that Michael O'Neill will be without two of his four Premier League players for the crucial game.
Conor Bradley is also absent with a knee injury, which leaves Trai Hume and Justin Devenny as the only players who have played in the top flight this season.
But how will Northern Ireland cope without Ballard, and who could replace him?