The sale of Gallagher - a boyhood Chelsea fan and an academy graduate - did not go down well with the fans who slammed the club owners Todd Boehly and Co. on social media.
A fan named Otunba wrote on X while responding to Fabrizio Romano's post about the transfer, "Chelsea owners will regret this."
A handle named Crusz United reiterated the sentiment as he wrote, "Chelsea might regret losing Conor Gallagher."
A fan named John Osaigbovo accused Boehly and Co. of making money out of the club instead of focusing on rebuilding the team as he wrote, "The entire Chelsea family will regret letting Conor Gallagher leave. The new owners are here for business sake and not interested in reshaping the club."
A fan, with the handle named FPL Side Net Podcast, wrote, "I hope Conor absolutely smashes it over there. His treatment by the club has been nothing short of deplorable. For someone who did everything he could in his time to be treated as a commodity to balance books says more about the current ownership."
Jeff, on the other hand, wrote, "The @ChelseaFC management is doing things in an unprofessional manner. This is not the legacy of our club! Conor Gallagher did not want to leave his boyhood club but you forced him to do so because of money! Boehly, Stewart and Winstanley are big mistakes in this great club!"