This Koscielny red card vs Manchester City ( VIDEO BELOW) saw Arsenal reduced to ten men in their clash against the Citizens on January 13, 2012. Koscielny’s red card was given by referee Mike Dean for a rugby style tackle on Edin Dzeko, but the Bosnian missed the subsequent penalty.
Video- Koscielny red card v Man City- Arsenal 0-0 Man City ( Koscielny red card 10′)
Koscielny’s red did cost Arsenal as they eventually went down 2-0 to Man City.
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