Welbeck scored one and created another in the 3-0 win.
Hernandez came off the bench to make an earlier-than-expected start to his campaign, Ferguson now faces a selection dilemma in attack for the next home clash with Arsenal, this Sunday at Old Trafford.
"If you look at Dimitar Berbatov, Michael Owen, Chicharito and Wayne Rooney, they've all got different qualities," he told manutd.com. "That's not a problem, you have to utilise the team as best as you can. The horrible part for me now is that with Chicharito back, what do we do? It's going to be a big problem for me."