Liverpool continued their excellent form at Anfield as goals from Joe Allen and Roberto Firmino completed a fine week with a 2-0 Barclays Premier League win against Watford.
Liverpool have now lost only one of their past 12 BPL fixtures at Anfield and their top-six dreams are still alive due to their latest home win, while Watford remain 13th.
Ighalo almost opened the scoring with a spectacular strike after seven minutes, seizing on Allen's loose pass and sending a long-range lob just over the crossbar.
Liverpool were indebted to goalkeeper Mignolet, who made a wonderful fingertip save to deny Ighalo after 55 minutes, the 16-goal striker's goalless run stretching to 12 league matches.
Almen Abdi whipped a free-kick over the crossbar after 67 minutes as Watford, who have scored only four goals in their last nine away BPL matches, sought an equaliser.
Substitute Steven Berghuis then shot straight at Mignolet from an excellent position but Liverpool's win was confirmed after 76 minutes.
Sheyi Ojo's pressing forced a mistake by Ikechi Anya, which led to Firmino advancing on goal, the Brazilian hitting a deflected shot that Gomes got a hand to, despite it taking a nick off Anya.
Benteke almost added the goal his industrious display deserved with eight minutes to go but Gomes shovelled his shot around the post, before Jordon Ibe struck the outside of the woodwork late on as Liverpool claimed victory.
