Crysencio Summerville had given the Hammers a second-half advantage by opening the scoring, before Casemiro nodded United level shortly after, notching his first goal of the season in the process.
But there was to be late drama in East London, with referee David Coote awarding the hosts a penalty in stoppage time, as Matthijs de Ligt was adjudged to have fouled Danny Ings.
After a lengthy VAR review, Coote concluded that our Dutch defender had indeed upended the Hammers' no.18, with Jarrod Bowen converting from the spot to ensure victory for Julen Lopetegui's side.
Following the game, Lisandro provided his thoughts when speaking to MUTV, expressing his displeasure over a game he felt United deserved plenty more from.