Kuyt has been Liverpool's lucky charm in such games, and this was his ninth goal in 15 European outings.

Last season he scored seven times as Liverpool reached the semi-finals, but none were worth more than the one he forced over the line with two minutes of extra-time left.

Jose Reina saved well after seven minutes from Dieumerci Mbokani's 20-yard shot to keep Standard from taking that early lead.

Liverpool responded with an Fabio Aurelio curling free-kick which was punched away by Aragon Espinoza, with Fernando Torres and Robbie Keane both failing to capitalise on the loose ball.

Then Steven Gerrard's instant pass into Yossi Benayoun's feet ended with the little midfielder mis-hitting his shot wide.

In a very open game, Xabi Alonso saw a 25-yard strike skim away from goal with Espinoza beaten.

Liverpool opportunities were rare. Kuyt, in his 100th game for the club, headed wide from Aurelio's corner after 40 minutes, but the game was not going according to the home side's script.

Belief was flooding through Liege's minds and bodies after the break, and with Liverpool not playing well and making too many unforced errors, extra time was an inevitability.

Ryan Babel crossed from the left with just two minutes of extra time remaining, and Kuyt forced the ball home on the far post for the only goal of the tie, leaving Liege barely any time to regroup.