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Arsenal 2-1 Manchester City - Sergio Aguero drew first blood for City.
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Nacho Monreal (L) scored the equalizer for Arsenal.
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Alexis Sanchez scored the winner for Arsenal in extra-time.
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Burnley 0-2 Manchester United - Manchester United players wore shirts displaying names of injured team-mates Marcos Rojo and Zlatan Ibrahimovic.
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Anthony Martial scored the opener for Manchester United.
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Wayne Rooney doubled United's lead.
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Celtic 2-0 Rangers - Callum McGregor scored the opening goal for Celtic against Rangers.
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Scott Sinclair converted his penalty to make it 2-0 (FT) for Celtic.
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Lazio 6-2 Palermo - Ciro Immobile scored the first two goals for Lazio.
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Balde Diao Keita scored a hat-trick in under six minutes for Lazio.
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Andrea Rispoli scored both the goals for Palermo. (FT: Lazio 6 -2 Palermo)
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AC Milan 1-2 Empoli - Levan Mchedlidze sends one past AC Milan goalkeeper Donnarumma.
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Gianluca Lapadula scored AC Milan's only goal.
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AC Milan players look dejected after their 2-1 loss to Empoli.