The home side then sealed the three points in the 84th minute as Trossard turned provider with a free-kick, which Shane Duffy slid in to tap into the net.
Fabinho established himself as one of the key players at the premier league leaders and he had a massive contribution in Liverpool's 3-1 victory over Manchester City at the biggest game of the season which gave Liverpool a comfortable lead at the title race.
BBC Sport pundit Pat Nevin couldn't believe what he was seeing. "Anything can happen. Today we played some unbelievable play but those mistakes cost us".
But it was the Hammers who were the more likely to add to the scoring as the second period wore on with Kepa Arrizabalaga keeping them at bay with a string of saves, while Michail Antonio had a goal ruled out after a VAR review for handball.
"In the second half it was hard work again and the boys put in another incredible shift".
Adrian came on for Oxlade-Chamberlain to replace Alisson, only to immediately concede from the ensuing set-piece after Dunk took it early and surprised the Reds to make it 2-1. The boys threw everything on the pitch. The red card made it a really special win'.
The Reds star will now miss the Merseyside derby on Wednesday when Everton make the short trip across town. There was no offside and then it is a tricky situation.
"We conceded a bit of a odd free-kick, the red card for Alisson, and we should have done better, but it's not easy to play every couple of days and make sure we are more than 100 per cent".
Quick thinking from Lewis Dunk saw him rifle in a free-kick as the Liverpool defence switched off.
"I try to be important", he said.
"They have let Liverpool get that lead now". I'm very proud of the effort and what we tried to do.
Dejan Lovren acknowledges the fans following the UEFA Champions League group E match between Liverpool FC and SSC Napoli at Anfield on November 27, 2019.
He said of opening up an 11-point lead over the chasing pack: "It's how it is".
"I might be a hero in Liverpool now but in all seriousness we need as many points as we can and we need to keep moving up the table". "We don't think about these things". The entire crowd, Brighton supporters included, rose to their feet as "Justice for the 96" echoed around Anfield for the first six minutes of the game.
Liverpool play nine games in December, including a much-publicised double-header that will see a youthful side face Aston Villa in the EFL Cup quarter-finals the day before the first XI play a Club World Cup semi-final.