With United already leading thanks to Marcus Rashford's first-half goal, Herrera made the game safe for the 'Red Devils' just after the hour mark.
United countered at pace, with Alexis Sanchez leading the charge.
As he bore down on goal, the Chilean had the presence of mind to play in the overlapping Herrera to his left and the Basque made no mistake, rifling a low effort past Artus Krysiak and into the bottom corner.
Check out the strike for yourself below:
26 January 2018