Liverpool were frustrated by a battling Norwich side at Carrow Road but narrowly avoided dropping points for what would have been only the second time this season.
The league leaders were stifled by the relegation strugglers, and almost fell behind but for Alisson’s efforts to deny
Teemu Pukki.
Naby Keita had the best of Liverpool’s chances, but failed to convert a rebound past Tim Krul from inside the six-yard box.
Alexander Tettey then rattled the post with a driven cross-shot from the edge of the box which had Alisson scrambling, as Norwich applied some pressure.
But cue the introduction of Sadio Mane as a substitute to provide the crucial winner.
The forward plucked Henderson’s long ball out of the sky before drilling a shot into the bottom corner to spare Liverpool’s blushes.