Keegan shared his experience with a doctor who specialized in treating stage four cancer. The doctor reportedly has a high success rate, with a 33% strike rate against the disease.

Keegan joked about the doctor's impressive record, saying, "I said: 'Fantastic! What is your strike rate?' He said: '33 per cent.' I thought he might say 80, maybe 90!"

Keegan also mentioned that he wants to say goodbye to the fans, as he didn't get the chance to do so when he left the club in 2008. He has vowed never to return to St. James' Park while Mike Ashley was the owner, but Ashley has since left the club.

Keegan is likely to return to the stadium for an emotional farewell to the fans when the new season begins.