The time to bed in young defenders, untried in the Premiership, is pre-season, Carling Cup and early League games, not in six-pointers at the business end of the season.
At this crucial time of the year you need rested, battle-hardened pros to step up, characters who have done it all and seen it all during their time in football. People who won't be phased by a visit from Arsenal.
Luckily, we have one such character. The manager will select Carra.