Jorrel Hato made his professional debut for Ajax in February 2023, at the age of 16 years and 10 months. He went on to become the youngest captain in the club's history, as well as the youngest player to reach 100 appearances.

During his time at Ajax, Hato made 111 appearances for the team, scoring four goals and providing 10 assists. He is a left-footed defender who can play in various positions, including left-back and central defense.

Hato's signing is a significant boost to Chelsea's squad, which won the UEFA Conference League and FIFA Club World Cup last season. The team will compete in the UEFA Champions League this season and will face Bayer Leverkusen in a friendly match on August 8th.

Hato will compete for a spot in the team with other left-backs, including Marc Cucurella. He may also be considered for a central defensive role, where he will face competition from players like Levi Colwill and Tosin Adarabioyo.

Chelsea's Premier League season will begin on August 17th, with a home match against Crystal Palace.