SEE MORE: Arsenal 1 - 0 Newcastle video: Cech to the rescue for disappointing Gunners Arsenal 1 - 0 Newcastle player ratings: Lucky Gunners snatch victory through Koscielny Laurent
Koscielny goal video: Arsenal stay top as Newcastle finally undone by defender
Video replays for penalty calls, sending offs and whether a
goal should stand would certainly have helped Arsenal this weekend as we would have had two penalties and the game would have been wrapped up before
Koscielny's potential second yellow, but how would it have affected our race for the Premier League title?