The Reds fell behind when a mistake by Michael Carrick gifted possession to Alejandro Dominguez, who in turn set Pablo Hernandez up to beat Ben Amos after 32 minutes.
Anderson equalised for United, the Brazilian quickest to react after Valencia goalkeeper Vicente Guaita had parried Ji-sung Park's shot.
Full report to follow.
Source: Manchester Evening News
Source: M.E.N.