Since taking over the Old Lady in 2014, the 51-year-old has led Juve to five straight Serie A titles, as well as winning four consecutive Coppa Italia crowns between 2015 and 2018.
In Sarri's first season in charge at Stamford Bridge, the former Napoli boss took the club to the EFL Cup Final, and will soon take his side to face Arsenal in the Europa League final. He also looks at potential options to replace Allegri at Juventus, including Lazio manager Simone Inzaghi and even the man Allegri replaced in Turin: Antonio Conte.
Allegri's final game will be at Sampdoria on 26 May.
This placed huge scrutiny on Allegri, with Juventus desperate to end their 23-year wait to lift Europe's biggest club prize, and the club have now confirmed they will be seeking a new manager in the summer.
Guardiola failed to win the Champions League at Bayern Munich and has yet to deliver it at Manchester City, with his last success in the competition coming with Barcelona in 2011. I'm not going to move, I'm satisfied here, I'm not going anywhere. I am going to stay, if they want, two more seasons here.
A success with Juve during his last period at the club between 2011 and 2014, Conte has been out of work since leaving Chelsea a year ago. However, it seems Pep might simply be a pipedream for Juve: speaking on Friday, he told reporters: "How many times do I have to say?"
There has been a lot of speculation about the future of the Manchester City boss of late, despite his current contract running up until 2021.