Liverpool manager Juergen Klopp said elite-level coaches cannot give guarantees about their touchline behaviour due to the pressure that comes with being involved in the Premier League but he urged his counterparts to set higher standards.
Swiss internationals Johan Djourou and Philippe Senderos would be the main candidates to replace him on Tuesday.
Swedish striker Zlatan Ibrahimovic returned to Manchester United on a year-year contract "to finish what I started," the 35-year-old announced in a club statement on Thursday.
Antonio Valencia's early thunderbolt put Manchester United en route to a 4-0 Premier League victory over Everton on Sunday, but they needed a flurry of late goals to finally subdue their unfortunate visitors.
Holders Arsenal kept up their bid for a hat-trick of FA Cup trophies, marching into the quarter-finals as Olivier Giroud and Theo Walcott netted twice in a 4-0 replay win at second-tier Hull City on Tuesday.
After damaging losses to Dinamo Zagreb and Olympiakos Piraeus in their first two fixtures, the Gunners have to win to advance to the knock-out stages
Arsenal captain Cesc Fabregas could be out of action for upto three weeks after injuring his hamstring in Tuesday's Champions League defeat by Braga, manager Arsene Wenger has said.
Arsenal's Laurent Koscielny is the best defender in the Premier League, according to former England and Manchester United centre-back Rio Ferdinand. Ferdinand also praised the Gunners backline in Wednesday's impressive 3-0 Champions League win over Greek champions Olympiakos Piraeus, which sealed their progress to the knockout stages for a 16th consecutive year.
Barcelona will put Manchester City to the sword if they commit the same kind of errors as they did in their Champions League encounter last month, coach Luis Enrique said.
Results and images from the English Premier League matches played on Saturday.
News of all that's transpired on and off the football field on Saturday
Tottenham Hotspur beat local rivals Arsenal with second-half goals from prolific pair Dele Alli and Harry Kane on Sunday to maintain their Premier league title challenge.
Manchester City moved back into third place and almost guaranteed Champions League qualification thanks to a 3-1 home victory against West Bromwich Albion on Tuesday at the Etihad Stadium.
News of all that's transpired on and off the football field
Arsenal manager Arsene Wenger has reportedly given the green light to break the bank and spend 40 million pounds on controversial Liverpool striker Luis Suarez and the club is confident that Suarez will quit Liverpool for a sensational move to the Emirates.
Cesc Fabregas has finally made up his mind to quit Arsenal this summer and join Barcelona in a 30 million move.
Arsenal will put one of the best Champions League records on the line when they face Olympiakos Piraeus in a showdown for second spot in Group F on Wednesday.
Leeds United manager Marcelo Bielsa asked his players to allow the visitors to score unchallenged when the game was restarted.
Runaway Premier League leaders Manchester City beat champions Chelsea 1-0 at the Etihad Stadium on Sunday to extend their lead to 18 points and leave the London side further adrift from the Champions League qualification spots.
Newspapers have been buzzing with speculation over England left back Cole this week, following reports that he met Chelsea bosses at a London hotel.
News of all that's transpired on and off the football field
Arsene Wenger was hoping to get a better idea from a scan which Henry was having on a groin injury.
The Arsenal manager is not sure whether the injured striker will be fit for next month's FA Cup final against Manchester United.
Arsenal are seeking compensation from the Dutch Football Federation for the injury sustained by striker Robin van Persie last month, manager Arsene Wenger said.
Arsenal midfielder Aaron Ramsey hopes the North London can choke LeicesterCity's unexpected Premier League title charge after picking up their first win in five matches in Sunday's 2-0 win over Bournemouth.
A tactical switch by Arsene Wenger has made free-scoring Arsenal look like title contenders before Saturday's Premier League trip to champions Manchester United.
Following is a match by match look at the English Premier League's weekend fixtures:
Striker Robin van Persie has recovered from a groin strain and returns to Arsenal's squad for the Champions League semi-final second leg against holders Manchester United on Tuesday, manager Arsene Wenger said.
Images from the English Premier League London derby played between Arsenal and Chelsea at the Emirates on Wednesday
Sanchez, 28, is currently in the final year of his contract. He has been linked with a move to Paris St Germain in the current transfer window.
Arsenal striker Emmanuel Adebayor faces three weeks out after damaging his hamstring in the goalless draw with Tottenham Hotspur on Sunday.
News of all that's transpired on and off the football field
'We are like his home. We are like his family ... We are going to help him to feel good'
Arsenal have only themselves to blame after a run of two wins in nine games in all competitions has left them with only an outside chance of winning any silverware, midfielder Mesut Ozil was quoted as saying on Thursday.
Danny Welbeck's hat-trick in a 4-1 thrashing of a feeble Galatasaray side helped ignite Arsenal's Champions League campaign in a lop-sided Group D clash in north London on Wednesday.
Jose Mourinho said he was sad to see midfielder Juan Mata leaving Stamford Bridge after confirming that the Spaniard's move to Manchester United was imminent on Friday.
Arsenal had to come from behind after Sergio Aguero scored his 30th goal of the season for City in the 63rd minute, racing away on to a pass from Yaya Toure.
Holders Arsenal's long unbeaten run in the FA Cup continued but they were frustrated by stubborn Championship leaders Hull City on Saturday, drawing 0-0 in a dreary fifth-round tie at the Emirates Stadium.
Watford climbed into the top four of the Premier League after Tom Cleverley's 92nd-minute goal gave them a 2-1 victory over Arsenal at Vicarage Road on Saturday.
