being cup-tied in Europe.
Last meeting: A matter of days after United won a pulsating Barclays Premier League encounter 3-2 at Stamford Bridge, the teams served up another thriller in the Capital One Cup. A much-changed side, including rookie defenders Alexander Büttner, Michael Keane and Scott Wootton, performed admirably but Eden Hazard's last-gasp penalty forced extra time and the hosts qualified - despite a double by Ryan Giggs.
Did you know? United have met the same team in both domestic cup competitions 13 times over the years and on five occasions since Sir Alex took charge in 1986.
Opposition boss: Rafael Benitez has had many clashes with the boss in the past during his Liverpool days and famously delivered what became known as 'Rafa's rant' at a press conference when he criticised the Scot and United. The Spaniard forged his reputation at Valencia and has also coached Inter Milan but his appointment as 'interim' manager at Stamford Bridge met with disapproval from a large section of the club's support. Nonetheless, he is a shrewd tactician who will be looking to get one over the Reds again at the Theatre of Dreams.
Star man: Juan Mata has enjoyed a fabulous season and is going from strength to strength in the Premier League. The astute acquisition from Valencia actually started his career in Real Madrid's B team and is a mainstay of the Spain squad. The 24-year-old has twice scored in games against United and looks certain to be a major threat again at the weekend.