United Kingdom, July 4 -- Paul Simon has successfully undergone surgery for "chronic and intense back pain".

The 83-year-old singer / songwriter was forced to cancel two concerts last weekend after his pain became "unmanageable" and while his surgery "went well", he will need an extra day of rest and recuperation before he starts touring again.

A message on his Instagram stated: "As previously reported, Paul Simon underwent a surgical procedure this week to alleviate severe back pain that he has been experiencing for some time. Thanks to a great team of doctors, the surgery went well, as expected.

"However, it has become clear he will need one additional day of rest and recuperation to insure he is able to perform at the top of his abi...