Leeds United have signed AC Milan striker Noah Okafor for £18m to take spending by Premier League clubs this summer to a record £2.37bn.The Switzerland striker has joined the Premier League club on a four-year deal.The 25-year-old becomes Leeds' ninth summer signing since winning the Championship to secure their return to the top flight."As a kid, I dreamed of playing in the Premier League. That's why for me it was quite an easy decision," said Okafor. "My football suits the Premier League so this is like a dream come true. I can't wait to step on the field."I heard that the Premier League is the best league in the world, it's so intense. I have loads of friends that played there. I'm really, really excited."Okafor's arrival means Premier League clubs have now spent more than the previous record in a single transfer window, the £2.36bn total in the summer of 2023. The Swiss played for Basel and RB Salzburg before joining Milan on a five-year deal in 2023. He scored seven goals in 54 games for the Italian club before ending last season on loan at Serie A rivals Napoli.