There is a clue in the name of the ground? No? Man U's ground is not in Salford!M16
Manchester/Trafford postcode including City Park & Old Trafford.M5
Salford postcode including Ordsall & New Windsor.M6
Salford postcode including part of Eccles, Irlam o' th' Heights, Brindle Heath, Charlestown, Pendleton, Wallness & Seedley.M7
Salford postcode including Kersall, Lower Kersall, Broughton & Broughton Park.M50
Salford postcode including Salford Quays, Weaste & Little Bolton.
Hmmmm strangely enough ARSE Old Trafford comes under Trafford...Or were you thinking of the Cliff? Doubt you'd have seen a pro game there though LOL!