Bruno Fernandes' second-half penalty proved the difference as Manchester United earned a 1-0 win over West Bromwich Albion.
Man Utd started the match well but West Brom goalkeeper Sam Johnstone twice produced fine saves to deny Anthony Martial.
A minute after the break, West Brom were awarded a penalty following a foul on Conor Gallagher by Fernandes. However, referee David Coote overturned his decision after reviewing the pitchside monitor.
At the other end, a penalty for handball by Darnell Furlong was converted at the second attempt by Fernandes on 56 minutes.
The Portuguese's spot-kick was initially saved, but the VAR adjudged Johnstone came off his line too early and the retaken penalty was scored.
A first home victory of the season moves Man Utd up to ninth on 13 points. West Brom stay 18th on three points.