Liverpool goalkeeper Alisson gave little away on his penalty-saving techniques after keeping out Jarrod Bowen's spot kick in West Ham United's 1-0 defeat on Wednesday night.
Darwin Nunez's first-half strike was the difference between the two sides as the Hammers' five-match unbeaten run in October, in all competitions, came to an end at Anfield.
David Moyes' side had the chance to draw level when they were awarded a penalty after Bowen was fouled by Joe Gomez, after a VAR consultation, but the England international saw his effort saved by the diving Brazilian.