Hernandez ruins Suarezs Liverpool return
But the controversial Uruguayan's presence in the Liverpool starting line-up wasn't enough to galvanise his team to victory at Old Trafford as Hernandez bagged the winner for United less than two minutes into the second half.
David Moyes's team were on course to bounce back from Sunday's painful 4-1 derby defeat at Manchester City, and also avenge a 1-0 loss against Liverpool in the league this season, when Wayne Rooney's corner picked out the unmarked Hernandez to volley home in the 46th minute.
Suarez, who had angered Liverpool with his failed attempt to engineer a move to Arsenal during his suspension, hit the bar with a free-kick in the closing stages and also went close when his powerful strike rippled the side-netting, but United held on to move into the fourth round.
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