Manchester City’s Premier League lead has significantly shrunk of late, meaning that getting a result in the 187th edition of this famous derby with Manchester United is of vital importance. Five clean sheets in six competitive fixtures is ominous form to bring into one of the world’s most high-profile matches, particularly as one or both sides failed to score in each of the last six competitive meetings. Their defence will have to be on top form again here though as the ’Cityzens’ have won just one of the last seven head-to-heads they’ve hosted (D1, L5). As they seek a first league double ove…