Michael Carrick's chequered history with Man City: Playing the peacemaker with x-rated blast in 30-man brawl, THAT title heartbreak, a crucial goal in cup thriller - and the one moment he lost his temper with Sir Alex Ferguson
CHRIS WHEELER: When these two old rivals clash again at Old Trafford in the 198th Manchester derby on Saturday, United will be relying on Carrick's composure and presence of mind once again.