PARIS, France: Manchester United fought back from two goals down to beat Roma 3-2 in the Champions League on Tuesday to hand beleaguered manager Michael Carrick a reprieve, while holders Paris Saint-Germain continued their perfect start in the competition by hitting Villarreal for six. Looking set for another abject defeat when two behind within 18 minutes through a smart Mathias Soule finish and Donyell Malen’s penalty, United staged a thrilling comeback in the second half to turn a poisonous a