Crystal Palace have confirmed the departure of Roy Hodgson as head coach.
Hodgson suffered a frightening health scare at training on Friday and has been receiving medical attention ever since.
Hodgson, 76, leaves Palace amid major supporter discontent with the club languishing in 16th and just five points above the relegation zone.
Chairman Steve Parish originally wanted to stick with Hodgson until the summer, but the veteran manager’s position at Selhurst Park had been uncertain for a number of weeks amid a run of just three wins in 19 matches in all competitions.
Hodgson then had a health scare during a Palace training session on Thursday.
The Premier League's oldest manager suffered the worrying episode as he put his team through their paces ahead of tonight’s clash at Everton on the training pitch at the club’s Beckenham facility.
‘Unfortunately, today’s press conference will no longer take place as scheduled as Roy Hodgson was taken ill during this morning’s training session,’ read a statement on Thursday.
Players and staff were said to be visibly concerned by the incident but Hodgson is understood to have recovered.
A later statement read: 'Following news that Roy Hodgson was taken ill during today’s training session, we can confirm that he is now stable and is currently undergoing tests in hospital.
'Everybody at the club sends their best wishes to Roy for a speedy recovery.'
Hodgson's successor, Glasner, will now look to hit the ground running in a bid to steer Palace to safety, and his first match will be a crucial home game against Burnley on Saturday.
Steve Cooper, Julen Lopetegui and Kieran McKenna were all high on the club’s list - but Palace have plumped for Glasner, who has previously managed in Austria and Germany.
Glasner's last role saw him take charge of Eintracht Frankfurt. He led the club to Europa League glory in 2022, before leaving last summer after two years at the helm.
Hodgson vowed he could have turned around Palace's 'bad period' around days before his departure, but has not been given the chance to do so by Parish.
Hodgson's exit comes after the mood soured among the Eagles faithful in recent weeks, with furious fans unfurling banners blaming 'wasted potential' and 'weak decisions' after the 5-0 defeat by Arsenal last month.
Hodgson narrowly avoided being struck by a missile launched from the Selhurst Park stands earlier this year and afterwards claimed supporters had been 'spoiled' by the club in recent years.
This is Palace's longest continuous run in the top flight in their history, now on to their 11th-straight season following promotion in 2013.
However, a talented crop of players including Eberechi Eze and Michael Olise has often looked shackled and they have slumped to 16th in the table, just five points above the drop zone.
They took the lead against Chelsea last Monday night but conceded an equaliser just after the break and capitulated in stoppage time, shipping twice to surrender a point.
Conor Gallagher scored twice against his old club to fuel the Blues' comeback and condemn Palace to a third league defeat in four games.
This season, Hodgson managed only seven wins in 28 games, losing 14 times.
After being re-appointed last March, Hodgson managed 38 matches, winning 12, drawing 10 and losing 16 of them for an average of just 1.21 points per game.