Champions Liverpool were ripped apart 7-2 at Aston Villa and Manchester United were humiliated 6-1 at home by Tottenham Hotspur on Sunday in one of the most astonishing days of Premier League results.
Lionel Messi scored his maiden goal for Paris St Germain in Tuesday's 2-0 Champions League victory against Manchester City.
Images from the English Premier League matches played on Saturday
The two previous meetings at Anfield ended in 4-0 and 3-1 defeats for Arsene Wenger's Arsenal teams, but there is a fresh optimism around the club after a successful transfer window.
Liverpool won the Super Cup 5-4 on penalties against Chelsea
Newcastle grabbed a point to leave City manager Pep Guardiola frustrated.
Atletico Madrid took a giant step towards the La Liga title
Juergen Klopp's side, chasing their maiden title in the Premier League era and first in the top flight in 30 years, took a 14th-minute lead from a Virgil van Dijk header but had to wait until stoppage time to put the game to bed through Mohamed Salah.
Barcelona were held to a frustrating 0-0 draw at Olympique Lyonnais in their Champions League last-16 first leg on Tuesday as both sides remained unbeaten in this season's competition.
Images from the Champions League football matches played on Wednesday night.
Images from EPL matches played on Wednesday
Liverpool will feel the weight of increased expectation to deliver silverware this season after making encouraging forays into the transfer market, manager Juergen Klopp said.
Images from Wednesday's action in the UEFA Champions League.
Van Dijk was substituted early in the game when Everton goalkeeper Jordan Pickford made a reckless challenge in the box, which left Liverpool manager Juergen Klopp fuming.
Leaders Liverpool faltered in the English Premier League title race for the second time in six days as they were held to a 1-1 draw at West Ham United.
Their work in the transfer market has also added to the positivity around the club after German manager Juergen Klopp made some major moves that have clearly strengthened his squad.
Two goals each for Roberto Firmino and Sadio Mane helped Liverpool to keep in touch with Premier League leaders Manchester City with a 4-2 win over lowly Burnley at Anfield on Sunday.
Brazil comfortably reached the World Cup last 16 after Paulinho and Thiago Silva scored in each half to give them a 2-0 win over Serbia who were eliminated on Wednesday.
An extra-time goal from Roberto Firmino gave Liverpool a 1-0 victory over Brazil's Flamengo to win the Club World Cup at the Khalifa International stadium on Saturday. It is the first time Liverpool have won the competition, which features each continent's champions, and they became only the second English team to lift the trophy after Manchester United in 2008.
Images from the English Premier League matches on Saturday.
Brazil coach Tite has recalled veteran central defender Thiago Silva to his squad for the World Cup qualifiers against Bolivia and Venezuela.
Liverpool moved into the Champions League qualifying spots after a 3-0 win at Burnley on Wednesday took them above Leicester City and into fourth place with one round of Premier League matches remaining.
Twelve months ago Liverpool were ripping up the record books on the way to their first English top-flight title for 30 years but defeat by Everton on Saturday left them mulling a host of far less flattering statistics.
The forward was again the stand-out Brazil player and he coolly side-footed home his 60th international goal in the 76th minute after Diego Laxalt brought down Danilo, although Uruguay claimed there was a handball in the build-up.
IMAGES from the English Premier League matches played on Sunday.
Images from English Premier League matches played on Sunday.
It promises to be a tense and thrilling finale to the season but Liverpool, who have frittered away a seven-point lead, will need to regain their momentum quickly if they are to push for their first league title since 1990.
European champions Liverpool made an emphatic start to the new Premier League season by scoring three times in the opening half an hour as they taught promoted Norwich City a harsh lesson with a 4-1 thrashing at Anfield on Friday.
IMAGES from the English Premier League matches played on Wednesday
Belgium used a combination of daring, intelligence, resilience and not a little luck to oust World Cup favourites Brazil 2-1 in a memorable quarter-final tie on Friday that would have made a worthy final.
Brazil's defensive record under coach Tite has been remarkable, with only six goals conceded in 25 matches, and they have been just as miserly in Russia where they have only conceded one goal.
Liverpool manager Juergen Klopp has a midfield conundrum and his Tottenham counterpart Mauricio Pochettino must decide whether Harry Kane is ready for action as both bosses face selection dilemmas for Saturday's Champions League final.
Liverpool thrashed Atalanta 5-0, Real Madrid boosted their chances of reaching the Champions League knockout stages with a 3-2 home victory over Inter Milan and Bayern Munich came from behind to crush RB Salzburg 6-2.
The brain may be sharp as ever, but the legs seem heavier, the pace worryingly slower. He's still only 32, but the strain of a decade-and-a-half of paranormal activity on the pitch may just be piling up.
Images from Sunday's action in the Premier League.
Manchester United and Chelsea secured places in the Champions League with wins on the final day of the Premier League season while Watford and Bournemouth were relegated along with bottom club Norwich City.
Teenager Curtis Jones grabbed a 58th-minute winner as an injury-hit Liverpool qualified for the knockout stage of the Champions League with a 1-0 win over Ajax Amsterdam at Anfield on Tuesday.
Serie A leaders Juventus scored twice in the last five minutes to win 3-2 at Inter Milan, who had earlier come from behind to lead despite playing with 10 men in an extraordinary match on Saturday.
Roberto Firmino struck a stoppage-time winner as Liverpool beat Paris St Germain 3-2 at Anfield on Tuesday after Kylian Mbappe looked to have secured a point for the French side in a compelling Champions League Group C clash.
Liverpool beat Leicester City 2-1 to post a fourth successive Premier League victory but conceded their first goal of the season after a nightmare mistake by new keeper Alisson.