Paul Merson was left blown away by what one Manchester City star did in the victory over Luton Town. Manchester City climbed to the top of the Premier League table, for a night at least, as they destroyed Luton Town 5-1 on Saturday. Pep Guardiola made six changes to the side that drew 3-3 with Real Madrid on Tuesday, with one eye on next week’s second leg, but there was no risk of an upset. Erling Haaland’s wayward effort deflected in for an own goal after 60 seconds and the game was already over. City completely dominated possession but didn’t add a second until Mateo Kovacic thumped in a gre…