Despite the closure of the summer transfer window, Premier League clubs can still acquire top players as free agents, following a record £1.8 billion spend. Notably, Kylian Mbappe's move to Real Madrid was the highlight of the summer, occurring as a free transfer after his contract with PSG expired. Keylor Navas, the Costa Rican goalkeeper and three-time Champions League winner, remains a notable free agent after a failed transfer to Monza. Other prominent free agents include former Liverpool defender Joel Matip and Mats Hummels, a World Cup winner with Germany, both of whom bring extensive experience. Clubs are encouraged to act quickly to secure these players before final squad submissions on September 14.