Liverpool skipper Jordan Henderson has warned his teammates that a two-goal lead over Manchester United in the Europa League tie could prove to be dangerous.

The midfielder has urged his teammates to keep their calm and focus when they travel to Old Trafford next Thursday for the second leg of the Round of 16 tie.

"Obviously we're confident but a two-goal advantage can be dangerous at times," Henderson said.

"We must focus on the away leg and go there as if it is 0-0."

Daniel Sturridge and Roberto Firmino scored either side of the break as Liverpool drew first blood over their arch nemesis.