The Blues are understood to have agreed a £38.6m deal to sign the France international, who has gone from strength to strength in a Monaco shirt over the past three years.
Disasi will reinforce the Chelsea backline after Mauricio Pochettino lost Wesley Fofana to a devastating ACL injury — the latest in a long line of setbacks for the Frenchman.
With the trio of Kalidou Koulibaly, Cesar Azpilicueta and Ethan Ampadu also leaving on permanent deals, Chelsea quickly turned their attention to finding a new right-sided centre-back after Fofana's operation.
Manchester United and Newcastle United were initially thought to be engaging in a two-horse chase for Disasi, but Chelsea moved quickly to agree a fee with Monaco, who only have the 25-year-old under contract until 2025.
According to journalist Fabrizio Romano, Disasi has now arrived in London to complete his medical tests, and the former Reims man will sign a five-year deal at Chelsea until 2028.
Romano adds that Chelsea and Monaco have already finalised the paperwork, and it is only a matter of time before Disasi is officially unveiled as the Blues' latest signing.
The 6ft 3in defender — who can also play as a right-back — made his senior breakthrough with Reims before earning a €13m (£11.2m) move to Monaco in 2020, and he immediately became a regular under Niko Kovac.
Disasi remained a crucial part of the Monegasques team under Philippe Clement and has now represented Monaco on 129 occasions in all tournaments, scoring 12 goals and setting up four more.
An eye-catching 2022-23 campaign saw Disasi come up with six goals and four assists in 49 games, and he
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