Liverpool captain Jordan Henderson sounded a note of caution after his side beat Manchester United 2-0 at Anfield to claim the advantage in their Europa League tie.
Roberto Firmino stabbed in the second goal to make sure of a win which had seemed a formality during the first half, when Liverpool played United off the park but somehow had only Daniel Sturridge's penalty to show for it.
The final result was greeted with huge cheers from the Anfield crowd but Henderson told BT Sport Europe the tie is far from over.
"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."
Liverpool were rampant in the first half as United goalkeeper David De Gea performed heroics to limit the damage, but there was nothing he could do about Sturridge's penalty after Memphis Depay was penalised for a tug on Nathaniel Clyne -- a decision disputed by United.
"I didn't see it," Sturridge said of the clash. "I wasn't involved and I didn't see it, but the most important thing is the team wins the game. That's what matters."
Sturridge was withdrawn just after the hour mark, but the England man said there was no fitness concern.
"It's the manager's decision to choose which players he wants to play," Sturridge said.
"I'm fine. I'm fit. I'm ready to play as many minutes as the manager is prepared to give me."