By Ashley Clements Follow @@Ashley_Clements Follow Sportsmail's coverage as Manchester United defeat Valencia thanks to a last minute winner from Marouane Fellaini and Diego Costa scores twice against Real Sociedad to help Chelsea win their final pre-season game of the season. United hosted Valencia as new boss Louis van Gaal made his Theatre of Dreams debut in front of the club's home fans. Click here to read the full match report. Meanwhile at Stamford Bridge, Chelsea were in action against Sociedad for their final pre-season test as Cesc Fabregas, Costa, Filipe Luis, Thibaut Courtois and Kurt Zouma made their Stamford Bridge bows. Click here to read the full match report.
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Manchester United defeat Valencia in Louis van Gaal's first game in charge at Old Trafford
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Chelsea win final pre-season game with 2-0 victory against Real Sociedad
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Marouane Fellaini scores winning goal for United
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Rodrigo equalises for Valencia whilst Diego Costa scores a first half double
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Wayne Rooney misses penalty for Man United
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Diego Costa scores to make it TWO in quick succession
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Diego Costa scores a neat finish on his Stamford Bridge debut
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Manchester United take on Valencia at Old Trafford in final pre-season clash
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Louis van Gaal to make Theatre of Dreams debut as Man Utd manager
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Wayne Rooney, Juan Mata and Ander Herrera all start
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Luke Shaw doesn't feature in the squad
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Kick-off at 7.30pm as Spanish side aim to test Red Devils in friendly
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Chelsea also play final-pre-season game when they face Real Sociedad
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Blues take on Spanish side at Stamford Bridge at 7.45pm
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Diego Costa and Cesc Fabregas set to make home debuts for the Blues
78mins: @placeholder shoots agonisingly wide as he finds space on the edge of the box.