Meath manager Robbie Brennan hailed his side's resilience and composure after they edged past Derry in a dramatic All-Ireland SFC Round 2B clash at Celtic Park.The Royals boss said post-match that he "knew we were at that level" despite recent provincial and All-Ireland championship defeats to Westmeath and Cork.Meath won a chaotic encounter 1-24 to 1-20 after a tense second half that saw both sides reduced to 13 men following a flurry of black cards, but Brennan said his players had already pro