Liverpool defender Virgil van Dijk allegedly stepped on the penalty spot before Jarrod Bowen's missed spot-kick.
West Ham United were awarded a penalty in the first-half at Anfield after a lengthy VAR process following a high from from Joe Gomez.
Bowen stepped up, only to see his effort saved by Brazilian shot-stopper Alisson, keeping the Reds 1-0 up at half-time Darwin Nunez opened the scoring.