By Jude Summerfield Erling Haaland will not play in Manchester City’s Premier League trip to Luton Town on Sunday, having not travelled with the rest of Pep Guardiola’s squad. City visit the promoted Hatters looking to end a run of four league games without a victory and can cut the gap to current leaders Liverpool to four points with a win after Arsenal’s loss at Aston Villa on Saturday night. However, the Cityzens will have to overcome Luton without Haaland, who has 19 goals in all competitions so far this season after netting 52 last term. Speaking before Sunday’s clash, Guardiola revealed …