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Diego Costa gave Chelsea a 1-0 victory over 10-man Arsenal on Sunday, damaging its London rival's bid to dethrone them as Premier League champions. (Reuters)
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Chelsea already looked the livelier team when it gained a man advantage in the 18th minute, following Per Mertesacker's red card-lunge on Costa. (Reuters)
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It took only five minutes after that for Arsenal's defense to be breached when Costa evaded defender Gabriel, who had been brought on to replace forward Olivier Giroud after Mertesacker's dismissal – a negative move by manager Arsene Wenger which sparked booing. (Reuters)
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Arsenal's first home league loss since the opening day of the season leaves Leicester as the leader by three points. (Reuters)
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The victory extended Guus Hiddink's unbeaten start as Chelsea manager to eight games, but the team only moved up to 13th. (Reuters)
