Hodgson, 76, was taken ill during training on Thursday and then underwent tests in hospital.

The club confirmed he is now out of hospital and "doing well".

In a club statement announcing his departure, Hodgson said: "I understand, given recent circumstances, it may be prudent at this time for the club to plan ahead, and therefore I have taken the decision to step aside so that the club can bring forward their plans for a new manager, as intended for this summer."

The former England manager's exit comes with Palace sitting 16th in the Premier League, five points above the relegation zone, ahead of the upcoming match with third-from-bottom Everton on Monday, live on Sky Sports.

It is understood Glasner will take charge after that game and will be tasked with boosting the form of a Palace side which has won just six of their 24 league fixtures this season, with only three of those victories coming since a 1-0 success at Manchester United in September.

The Austrian - who started his coaching career with Austrian sides SV Ried and LASK before heading to the Bundesliga with Wolfsburg - enjoyed success at Frankfurt, beating Rangers in the 2022 Europa League final before finishing runners-up in the German Cup the following season.

He was linked with the Tottenham vacancy last summer and was spotted watching on as Spurs lost to Wolves in the Premier League on Saturday, with Palace set to face their London rivals on March 2.

Hodgson took charge of his 200th match as Eagles manager last Monday when his side were beaten 3-1 at Selhurst Park by Chelsea.

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Disgruntled fans have displayed banners in recent weeks calling for Hodgson to be sacked and vented frustration with how the club is being run.

But Palace chairman Steve Parish said Hodgson "has a special place in Crystal Palace history and this will never be forgotten".

Hodgson kept Palace in the Premier League for four consecutive campaigns, before returning to the club in March 2023 for the final 10 games of last season to "steady the ship".

"Quite simply, we owe our continued Premier League status to Roy," Parish said.

Who is Oliver Glasner?

Glasner started his coaching career with Austrian sides SV Ried and LASK before heading to the Bundesliga with Wolfsburg.

His greatest success came at Frankfurt, with whom he won the Europa League in 2022, beating Rangers in the final on penalties.

Glasner's side followed up that success by finishing runners-up in the German Cup the following season.

Frankfurt decided to part ways with Glasner a year before his contract was set to expire after a disappointing second half of the campaign.

View from Germany: Glasner is tactical mastermind

Sky Germany reporter Philipp Hinze:

"This would be a surprise in Germany if Glasner joins Crystal Palace. I think Crystal Palace is a small English club and Glasner won the Europa League and also achieved Champions League qualification with Frankfurt and Wolfsburg.

"He's an under-rated coach, he is a mastermind tactically and he has his own minds. He is very strong and powerful and not the kind of person that says yes to everything.

"He is special in a positive way and a very good coach."

What do the stats say about Palace this season?

Hodgson leaves Palace with the club sat 16th in the table, just five points clear of the drop zone.

The Eagles have underperformed across a raft of attacking metrics in the Premier League. Going into this latest round of matches they ranked 17th for goals, 18th for expected goals and 19th for converting shots, while also registering the fewest sprints.

Injuries to talismanic duo Eberechi Eze and Michael Olise are a primary reason for those underwhelming numbers.

Palace have been twice as effective for goals scored, win rate and points-per-game in the four league games the pair have started together this term.

Hodgson's league returns this season are on par with Vieira's ratios when he was axed last season, hovering around a 25 per cent win rate and averaging at one point per game.