The former Tottenham and Chelsea manager insists the procedure was routine and that he's fit and healthy going into the New Year.
In a short video message, he said: "Merry Christmas. And thank you so much for so many messages."
He added a caption to the post saying: "Wishing everyone a happy holiday season.
"May this time be full of love and happiness for you and your families.
"For those of you who have shown concern, I can confirm reports of my surgery have been greatly exaggerated, it’s just a quick and minor procedure.
"I will resume training on the first day back from the holidays, as always.
"I’ve never missed a session in 25 years, and I don’t intend to start now. JM."
