Liverpool had the chance to go seven points clear at the top of the Premier League on Wednesday night following Manchester City's defeat to Newcastle.
Leicester City travelled to Anfield to stop them from doing that, but within three minutes the hosts took a 1-0 lead.
A stunning passing move from the Reds ended up with Sadio Mane darting into the box and curling a shot into the bottom-right corner.
It was the perfect start from Liverpool, but as the game wore on they allowed Leicester to create more and more chances.
And on the stroke of half-time, they were punished.
Harry Maguire pealed away at the back post and prodded past Alisson from Ben Chilwell's header into the box.
In the second half it was all Liverpool and they felt they should have had a penalty in the 57th minute when Naby Keita appeared to be tripped by Ricardo.
Keita played a neat one-two with Roberto Firmino and surged into the box before going to ground. No penalty, said referee Martin Atkinson.
Replays shows there was contact between Keita and Ricardo and that a spot-kick should have been given, but Liverpool fans believe Keita should have shot way earlier anyway.
In the video(s) below, the 23-year-old takes one too many touches when he should have had a go as soon as he got into the box.
It was a clear-cut penalty, but Keita was also to blame for not shooting earlier. Here's what Liverpool fans were saying on social media about the incident.