By SABC Sport
24th January 2024
The Brazilian was forced off during the Magpies' FA Cup victory over rivals Sunderland on January 6.
Manager Eddie Howe had previously suggested the 27-year-old could be out for around six weeks but the decision to operate now means the player will be sidelined until at least May.
A statement from the club read: "Newcastle United can confirm that Joelinton has successfully undergone surgery on a thigh injury sustained earlier this month.
"The midfielder will now commence a period of rehabilitation overseen by the club's medical team and is expected to return to action in May 2024."
The news is a further blow for Howe, who currently has a lengthy injury list to contend with.
Jacob Murphy, Callum Wilson, Harvey Barnes, Joe Willock, Matt Targett and Nick Pope are among the players currently out of action.