An evenly-matched, end-to-end Group E contest appeared destined to remain goalless with both sides having created, and spurned, a number of chances throughout.
But Genk substitute Sam Krawczyk pounced to put the rebound high into the net following Jakub Ojrzynski’s impressive double save in the 93rd minute.
The result, coupled with Salzburg’s victory over Napoli earlier in the day, means three teams sit on seven points after four pool matches.
Bottom-placed Napoli, who have collected just one point so far, are Liverpool’s next opponents in three weeks’ time.
More to follow…