Juan Mata picked up two yellow cards in the space of a couple minutes and was dismissed in the 26th minute dooming his United teammates to a 1-0 loss at the Hawthorns.
Juan Mata, Memphis Depay, Daley Blind and Matteo Darmian all started Manchester United's match against CSKA Moscow on the bench.
It was a day for Manchester United attackers as Juan Mata joined Wayne Rooney on the score sheet as he scored Spain's only goal as they beat Macedonia 1-0 in European Cup qualifying on Tuesday.
Manchester United took the lead with a Juan Mata goal but their defense finally cracked and allowed Swansea City to come from behind and defeat them again, 2-1.
Juan Mata scored the opening goal and was sharp throughout his shift as Manchester United played to a 1-3 win against San Jose Earthquakes.
Juan Mata appears to have rediscovered his Chelsea best just in time to face his former team in Week 33.
Juan Mata turned in perhaps his finest performance as a Red Devil to date, scoring twice to give Manchester United enough to beat Liverpool 1-2 which sees them five points clear of fifth place.
Juan Mata scored one and created one in Manchester United's 3-0 win over Liverpool continuing a strong run of form that has run from November into December.
Juan Mata has been on the outside looking in when United's attack is healthy but that may have to change as he continues to contribute to wins.
Juan Mata has been frozen out of the starting line-up in recent weeks but he came off the bench and scored the loan goal of the match in United's 1-0 win over Crystal Palace.
Juan Mata didn't contribute much beyond his goal in Manchester United's 4-0 win in Week 4 which doesn't bode well for the midfielder as his playing time comes into question.
Juan Mata led only two Manchester United players in double figure Yahoo fantasy points in Week 2 despite a rotten overall showing as a team against Sunderland.
Juan Mata scored an early goal to give Manchester United a 1-0 lead but Jack Rodwell equalized soon after to give Sunderland a 1-1 draw against the Red Devils.
Reports in Spain and England are reporting that Real Madrid are edging closer and closer to finalizing a deal for Angel di Maria.