Chicharito warns Man Utd Ajax tie not over
Hernandez denied United had virtually booked their place in the last 16.
"We know it is a leg of two games. We wanted a great result and thankfully we got the two goals," he told Channel Five.
"We know Ajax is a difficult team, they have history in the European cups.
"We know there is 90 minutes more. We can't say we are through yet."