Kalvin Phillips' nightmare start to life at West Ham continued at Nottingham Forest after he was sent off.
The Hammers remain without a win in this calendar year after suffering a 2-0 defeat at the City Ground on Saturday.
Taiwo Awoniyi opened the scoring deep into the first half before Callum Hudson-Odoi sealed victory for Forest in stoppage-time.
Phillips had yet another evening to forget after being sent off for a second bookable offence in the 71st minute following a high challenge on Morgan Gibbs-White.
The midfielder's sending off came just three minutes after he was initially shown a yellow for a shove on Nicolas Dominguez.