The game continued to provide the talking points in the early minutes of the second half as the substitute, Hegazi, might have seen red after making a poor tackle on Firmino, whilst the VAR system was back out again - however this time it was a brief affair as about six West Brom players were offside following an attack.
Liverpool were knocked out of the FA Cup fourth round for the third season running after succumbing to a 3-2 defeat to West Brom in what was a insane game at Anfield. Four minutes were added on as stoppage time in total in the first half.
Firmino's clever sixth-minute chip from Salah's rebounded shot after a misunderstanding between goalkeeper Ben Foster and Jonny Evans was cancelled out just 71 seconds later when Rodriguez fired into into the top corner after Georginio Wijnaldum lost possession in midfield.
Liverpool's lead lasted little more than a minute, though.
And four minutes later Rodriguez had his second by turning in a Chris Brunt cross. Grzegorz Krychowiak worked some space outside the Liverpool box and slipped the ball to Kieran Gibbs, and his low cross was side-footed home by the former Southampton man, with the home defenders static.
Liverpool were sensationally awarded a penalty after referee Craig Pawson took around three minutes to make the decision after consulting VAR and replays do show that Jake Livermore pulled Mohamed Salah down in the box.
West Brom persisted to impress as Liverpool were prevented from grabbing any sort of hold over the flow of play.
VAR became a big topic of conversation in the first half though, as West Brom was denied a third goal after the referee overturned Craig Dawson's goal upon review.
Foster saved well from James Milner and Salah gave Liverpool some late hope with a cool finish from 12 yards after West Brom failed to clear, but the visitors held firm for a win that continues their improved form under Alan Pardew.