After Sunday's crushing 4-2 derby defeat at Manchester United, even a top four finish and a place in next season's Champions League is no longer a certainty.
Normally the candidates for goal of the season are spread throughout the 10 months of the campaign, but this weekend's Premier League matches produced six memorable strikes in little over 24 hours.
A summary of Saturday's matches in the English Premier League.
Everton have agreed to sign Barcelona's Colombia centre back Yerry Mina for an initial 30.25 million euros ($34.97 million) and have also taken the club's midfielder Andre Gomes on loan, the Spanish champions said on Thursday.
News of all that's transpired on and off the football field
Jamie Vardy equalled the English Premier League record by scoring for a 10th successive match as his Leicester City side went top after winning 3-0 at Newcastle United while champions Chelsea ended their slump with a 1-0 win over Norwich City on Saturday.
A round-up of Saturday's matches in the English Premier League.
Bitter rivals Arsene Wenger and Jose Mourinho had wildly contrasting afternoons on Saturday as Arsenal went top of the Premier League and champions Chelsea lost again with their manager being sent off.
Goals from Victor Moses and Daniel Sturridge eased Liverpool through a tricky FA Cup fourth round tie at Championship (second division) Bournemouth on Saturday although they had to work hard for a 2-0 victory.
Chelsea beat Newcastle United 2-0 for a 10th successive Premier League home win at their Stamford Bridge stronghold on Saturday to reassert themselves as Premier League leaders while champions Manchester City drew at Everton.
Check out the top footballers of the weekend...
Former Manchester United striker Ole Gunnar Solskjaer was named the new manager of English Premier League strugglers Cardiff City on Thursday.
Chelsea overpowered West Ham United and Manchester City outclassed West Bromwich Albion as the Premier League title rivals signalled their intent at the start of a hectic holiday programme on Friday.
Manchester City paid the price for missed chances as they were held to a 1-1 draw at Burnley on Saturday with Johann Berg Gudmundsson's 82nd minute equaliser earning the hosts a share of the points.
Manchester United replaced Manchester City as Premier League leaders with Wayne Rooney ending an 11-match run without a league goal in his side's comfortable 3-0 win over Sunderland at Old Trafford on Saturday.
Swansea City came from behind to end Manchester United's unbeaten start to the Premier League season with an impressive 2-1 victory at the Liberty Stadium on Sunday.
The destination of the Premier League trophy will not be decided when current champions Chelsea meet their immediate predecessors Manchester City.
Manchester United have made purchases in the impressive Angel di Maria and Radamel Falcao and former manager Alex Ferguson has expressed his satisfaction at the changes made in the team line-up.
Cesc Fabregas and Branislav Ivanovic struck late goals to earn improving champions Chelsea a 2-1 victory at Southampton in the Premier League on Saturday.
Images from the English Premier League matches played on Saturday
Frank Lampard could make an emotional appearance against former club Chelsea this weekend as his new employers Manchester City host Jose Mourinho's side in an early showdown between the Premier League's heavyweights. Catch all the action.
Alex Oxlade-Chamberlain became the second England international to leave Arsenal in two days when he joined Premier League rivals Liverpool for a reported 40 million pounds on Thursday.
Jamie Vardy sent a screaming reminder that leaders Leicester City are in the Premier league title race for the long haul with a sensational strike in a 2-0 win over Liverpool on Tuesday.
English clubs took their spending on players for the season soaring past 1 billion pounds on Monday, but the biggest signing on transfer deadline day was that of a manager as Manchester City confirmed Pep Guardiola will take over this summer.
Manchester United's early season problems were compounded by a humiliating 4-0 loss to third-tier Milton Keynes Dons in the League Cup second round on Tuesday leaving new manager Louis van Gaal still looking for his first win.
A fortunate 85th-minute goal from Brazilian Willian earned Premier League champions Chelsea a 1-1 draw at Liverpool on Saturday after Mohamed Salah's 15th goal of the season looked to have given the hosts the three points.
Manchester United are satisfied with their transfer business and under no pressure to sign a fourth player in the current window, manager Jose Mourinho said.
Photos from the English Premier League matches played on Saturday
Leaders Chelsea stretched their Premier League winning run to a club record-equalling 11 as Diego Costa's header shortly before halftime secured a 1-0 victory at London rivals Crystal Palace on Saturday.
Leicester City continued to do their best Houdini impression on Saturday as they escaped the Premier League drop zone for the first time since November while Manchester City went up to second spot with a thrilling win.
Arsenal's improbable late run at the Premier League title gained momentum with a 1-0 victory at struggling Burnley on Saturday, an eighth straight triumph that moved them within four points of leaders Chelsea.
Following is a match by match look at the English Premier League's weekend fixtures:
A summary of sports events and sports persons, who made news on Friday
The English city's unheralded football club is on the brink of becoming league champions for the first time in their 132-year history, with just three defeats all season.
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.
Jonathan Soriano scored an incredible goal from near the halfway line to complete a stunning 3-0 win for Salzburg away to once-mighty Ajax Amsterdam in the Europa League round of 32 on Thursday.
David Silva came to the rescue of Manchester City with two goals in a 3-0 victory over Crystal Palace.
Wayne Rooney made history by equalling Bobby Charlton's Manchester United record and becoming the club's leading all-time goalscorer after netting his 249th goal (543 matches) during an FA Cup match against Reading on Saturday.
Despite a splurge of summer spending of more than 500 million pounds and counting, it was a free transfer from France who provided one of the standout moments of the Premier League's big kickoff.
Chelsea, Bayern Munich, Real Madrid and Juventus consolidated their top-flight leads at the weekend while Paris St Germain proved too strong for Ligue 1 leaders Olympique Marseille.