The manager: Sam Allardyce was installed at Upton Park in June 2011 and guided the Hammers back into the Premier League at the first time of asking with a play-off win over Blackpool, one of his earlier managerial posts. A no-nonsense defender in his playing days, Big Sam’s other jobs have included spells in charge at Bolton, Newcastle and Blackburn.
Last meeting: A 2-2 draw in east London helped the Reds edge even closer to league title no.20 on 17 April, with Robin van Persie helping to secure a point with an equaliser 13 minutes from full time.
Sub-plot: West Ham will slip into the relegation zone if they lose and Fulham and Crystal Palace pick up points in their respective fixtures.
Did you know? Wayne Rooney has scored seven goals in his last six Premier League outings against West Ham.
Star-man: Former United midfielder Ravel Morrison is the Hammers’ top scorer, with five goals in all competitions so far this season.
Whistle-blower: Chester’s Mike Jones handed out five yellow cards during the only other United match he has taken charge of this term, the 1-1 draw with Southampton in September.
Rivals watch: Liverpool kick off the weekend’s action at home to Cardiff on Saturday lunchtime, while Manchester City’s visit to Fulham starts at the same time United face West Ham. You’ll have to wait until Monday night to discover how Arsenal v Chelsea pans out.