By Jamie Spencer There is still a lot of football to play in 2023/24, but if teams aren’t looking ahead to the summer transfer window and next season they have already fallen behind the competition. In a world where Premier League Profit & Sustainability rules are increasingly king, bringing money in by offloading players in the market is as important as bringing them in to strengthen on the pitch. No club, even the wealthiest, can afford a bloated squad. 90min picks one player from each of the established ‘big six’ – Arsenal, Chelsea, Liverpool, Manchester City, Manchester United and Tottenha…