Newcastle United manager Joe Kinnear is set to undergo an emergency heart bypass operation after spending five days in hospital.
The 62-year-old - who had a heart attack when he was manager of Wimbledon in 1999 - was due to be discharged by his doctors but an angiogram revealed complications in his condition.
Kinnear was taken ill before Newcastle's match against West Bromwich Albion at The Hawthorns last Saturday - just over four months after taking charge of the Premier League club.
Some pundits questioned Kinnear's health when it was first announced he would be taking the reigns at St James' Park in late September last year, following the shock departure of Kevin Keegan.
However, at the time, the veteran coach - who had spent four years out of football since his previous management position with Nottingham Forest - downplayed suggestions there was an issue regarding his health.
Kinnear took time out from football following his heart attack ten years ago, returning to work with Luton Town in 2001, and if this operation goes ahead he is likely to be advised to rest at least until the summer.
Assistant coaches Chris Hughton and Colin Calderwood would take joint charge as the Magpies battle against relegation.