Nicolas Jackson appeared to question Chelsea's decision to part company with Mauricio Pochettino as Cole Palmer paid thanks to the Argentine.
On Tuesday, Chelsea announced Pochettino had left the club by mutual consent after just one season in charge, which ended in a sixth-place Premier League finish.
Several pundits expressed shock at the decision, after an upturn saw Chelsea recover from a poor start to the season to clinch European qualification.
Only four teams – Liverpool, Manchester City, Arsenal and Newcastle United – had a better expected goals (xG) figure than Chelsea (75.3) in the Premier League in 2023-24, while only three – City, Liverpool and Arsenal – had more shots on target than the Blues (215).
From March 11 onwards, Chelsea's return of 27 points was only bettered by eventual champions Manchester City, who took 28 in that span.
A number of Chelsea players appeared to be surprised by Pochettino's exit when reacting on social media, most notably Jackson.
Alongside an image of himself alongside Pochettino, Jackson wrote on Instagram: "Love you coach. Wish we could stay together more.
"But may God continue to bless you and your family. Thanks for the advice and support, you're a true lion and a fighter, wish you all the best."
Leading goalscorer Palmer, meanwhile, paid a heartfelt tribute to Pochettino in an Instagram post of his own.
"Gaffer, thank you for everything you have done for me and making my dreams come true," the England international wrote. "All the best."
Former Blues captain John Terry, meanwhile, said he was "gutted" to see Pochettino depart.
Posting to his Instagram story, Terry added: "I just hope we don't sign or sell any players until we get a manager in."
Ipswich Town boss Kieran McKenna and Brentford's Thomas Frank have been touted as possible successors, with co-owner Todd Boehly reportedly looking to hire a progressive young coach to work within Chelsea's existing structure.