Tony Pulis again praised his resilient Albion side after snatching a draw at Old Trafford.
Albion had their backs against the wall for the majority of the game and had Ben Foster to thank for a number of eye-catching saves.
Darren Fletcher hit the crossbar on his return to The Theatre of Dreams but Albion were fortunate United left their shooting boots at home.
"If we won at the end, it would have been unjust," Pulis admitted.
"We are really pleased with the effort and commitment they put in today, United have some really good players. No matter how well set up you are, you will always be on your back foot.
"The group plays very well together, they play very compact but we had opportunities to spring out of it like against Arsenal. Their resilience and commitment was fantastic."
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