On match days, there is a train service. This normally operates from
Alderley Edge or Crewe via Piccadilly, Oxford Road and Deansgate to
Manchester United Football Ground Halt, which is literally attached to the
side of the ground. You're more likely to have a pleasant journey on
there than on the overcrowded trams.

A couple of seasons ago I used the special train service to Old Trafford, there
was 4 trains going to Old Trafford before the match., 2 from Crewe and 2 from
Alderley Edge I believe. I did have to get a seperate ticket from Piccadilly to
get there but the train did drop me right outside the ground.
Hope this helps.

Burkey