Manchester United's summer transfer window is shaping up to be a busy one, with a number of key decisions to be made. The club is in the midst of a major rebuild, with seven players having already left and three more set to depart. The focus is now on finding the right replacements and strengthening key positions. One area of particular interest is the left-wing, with the club considering a move for West Ham's Crysencio Summerville. Summerville, a 24-year-old Dutch international, has impressed at the World Cup and is being eyed as a potential replacement for Marcus Rashford. However, the future of Rashford, who has been linked with a move to Barcelona, remains uncertain. United are also looking to strengthen their midfield, with Sander Berge and Felix Nmecha being considered as potential additions. Berge, a Norwegian defensive midfielder, would bring structure and steel to the team, while Nmecha, a German box-to-box midfielder, would provide creativity and combativeness. The club is also in the market for a new left-back, with Alvaro Carreras being monitored. Carreras, a Spanish youth product, has struggled to break into the first team at United and is now being eyed by other clubs. The summer transfer window is a crucial period for Manchester United, with the club looking to rebuild and strengthen key positions. The future of key players like Rashford and Casemiro remains uncertain, but the club is working hard to find the right replacements and build a competitive squad for the upcoming season.