Arsenal's hopes of catching Manchester City for second place in the Premier League suffered a setback.
Two Robin van Persie goals earned the Gunners a 2-1 victory as Chelsea slid to a second home league defeat of the season.
AC Milan grabbed a 1-1 draw at Manchester United in the blockbuster Europa League last-16 first-leg at Old Trafford on Thursday.
Arsenal captain Mikel Arteta will be out for the next three months after having a "successful" operation on the left ankle that has kept him sidelined since late November, the club said on Thursday.
Man United get injury boost ahead of Liverpool FA Cup clash
The four-times European champions went through 3-2 on aggregate after losing 0-1 in the second leg Champions League quarter-final.
Chelsea's recent record against Arsenal is awful. The Gunners chalked up two league wins and another in the FA Cup this season. \n\n
Chelsea manager Jose Mourinho congratulated Arsene Wenger on his 18 years as Arsenal manager on Friday and said he had no need to apologise for calling him a 'specialist in failure' last season.
Former World Cup winner and Arsenal's record goal-scorer Thierry Henry announced his retirement from soccer on Tuesday, bringing an end to his a glittering 20-year career.
Chelsea went second in the Premier League with a comfortable 4-0 win at Burnley, on Sunday, which maintained their unbeaten start to the season.
Arsenal manager Arsene Wenger has criticised Barcelona midfielder Xavi for claiming Cesc Fabregas is "suffering" at the Premier League club.
Arsenal recruited Lille's 24-year-old Ivory Coast forward Gervinho Monday as they bid to boost their firepower this season and end a trophy drought stretching back to 2005.
Atletico Madrid sealed top spot in Champions League Group D after second half goals from Frenchmen Kevin Gameiro and Antoine Griezmann but Napoli were held to a 0-0 Champions League draw at home by Dynamo Kiev.
The unstoppable Gareth Bale scored twice in Tottenham Hotspur's 2-1 victory over Newcastle United in the Premier League on Saturday while rivals Chelsea and Arsenal also won to add spice to the race for the Champions League spots.
The top three places in the Premier League table look secure for Liverpool, Manchester City and Leicester City, but the fourth spot, currently occupied by Chelsea, remains tantalisingly within reach for several clubs including Carlo Ancelotti's Everton and Ole Gunnar Solskjaer's United.
UEFA has postponed all Champions League and Europa League matches due to take place next week because of the coronavirus outbreak, European soccer's governing body said in a statement on Friday.
Thierry Henry, Arsenal's all-time leading scorer, will return to New York Red Bulls next week as his loan spell cannot be extended past the agreed date, Arsenal manager Arsene Wenger said.
However, Arsenal will be without Gilberto and Ashley Cole for the Champions League match against Celta Vigo.
Samir Nasri's move from Arsenal to Manchester City moved a step closer on Tuesday when Arsenal confirmed they had agreed terms with their Premier League rivals for the French midfielder.
Mesut Ozil guided Arsenal to a 2-0 victory over Napoli while a late Cesc Fabregas header gave Barcelona a laboured 1-0 win at 10-man Celtic in the Champions League on Tuesday.
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.
Premier League leaders Chelsea beat London rivals Arsenal 2-1 with goals from Spaniards Fernando Torres and Juan Mata on Saturday to maintain their unbeaten start to the season while handing Arsenal their first defeat.
The 28-year-old France mid-fielder said he is staying with the Premier League champions after having considered a move to Real Madrid.
Arsenal brushed aside Reading 2-0 at the Emirates on Saturday for only their second win in nine EPL games.
Arsenal forward Theo Walcott and Spanish midfielder Santi Cazorla have signed new contracts with the Gunners, the Premier League club said on Friday.
While Spurs play Inter Milan at home in Champions League on Wednesday, on Thursday, Arsenal face a long trip to Ukraine to play Vorskla Poltava in the Europa League, needing a victory to consolidate first place in the group.
Manchester United and Chelsea also won easily in the English Premier League.\n\n
Arsenal boss Arsene Wenger has repeated his intention to stay in management next season, saying retirement would be like dying.
For Arsenal, failure to defeat Wigan Athletic on Tuesday would leave their hopes of a 16th season in the Champions League in severe jeopardy; for Wigan Athletic, anything other than a win would quickly sour the taste of a memorable FA Cup final shock.
Arsenal and Liverpool played out a pulsating 1-1 draw while Fenerbahce came from behind for a 2-1 home win over Chelsea in Wednesday's Champions League quarter-final, first leg matches.
Arsenal's substitutes' bench was a man short against Bayern Munich on Tuesday after the Premier League side got caught up in red tape.
Midfielder Jack Wilshere will be offered a new Arsenal contract despite being sent to Bournemouth on loan this season, the London club's manager Arsene Wenger said on Friday.
Barcelona revive their entertaining rivalry with Arsenal on Wednesday in the first leg their Champions League last 16 tie that will showcase two of the most technically gifted and attractive sides in world soccer.
Arsenal go into their 10th successive Champions League campaign with burning optimism fuelled by their early season form and manager Arsene Wenger's newly signed long-term commitment to the club.
