Portsmouth academy coach Alan McLoughlin is undergoing surgery to have a kidney removed, the club have revealed.
The 45-year-old made more than 350 appearances as a player for Pompey and took on his current role at Fratton Park last year.
A statement from the club read: "Portsmouth Football Club would like to send their best wishes to academy coach Alan McLoughlin, who will be having a kidney removed today (Monday).
"Unfortunately this means Macca will be off work for a few weeks.
"Everyone at Pompey wishes him a speedy recovery and we look forward to seeing him back at work as soon as possible."