Rattled by embarrassing domestic defeats, Chelsea looked jittery before Olivier Giroud settled their nerves with a close range tap-in shortly after halftime at StamfordBridge following good work by N'Golo Kante and Willian in the build-up.
Against a background of supporter discontent over the form of Wenger's team as the Frenchman decides his future, with a protest outside the ground before kick-off urging the manager to leave his post, Arsenal were nervy from the start.
Cristiano Ronaldo delivered the knockout blow for Real Madrid in their aristocratic battle with AC Milan on Tuesday, as Arsenal, Chelsea and Bayern Munich maintained their own perfect Champions League starts.
Tottenham Hotspur and Newcastle United both sealed comeback victories to boost their European qualification hopes.
Lukas Podolski's transfer to Inter Milan moved closer on Saturday when the Germany forward met coach Roberto Mancini.
Chelsea's Ruben Loftus-Cheek had a Europa League night to remember by scoring the first hat-trick of his career as the midfielder inspired them to a 3-1 home win over Belarus champions BATE Borisov on Thursday.
Alexis Sanchez has said he is very happy at Arsenal but the Chile winger has put the onus on the north London club to put an end to the protracted contract negotiations to keep him at the Emirates Stadium.
Sevilla look set for a baptism of fire when they make their Champions League debut at Arsenal on Wednesday.
Ten-man Arsenal suffered a 3-0 Premier League defeat at Leicester City on Sunday in another blow to their hopes of finishing in the top four and qualifying for the Champions League.
In Pep Guardiola's 100th match in charge of the Manchester club, captain De Bruyne led from the front as City outclassed the Gunners, who have now suffered six home games without a win. Images from the EPL matches played on Sunday.
'I am a bit surprised by the score, but it is the Bayern mentality.' 'When it matters we are always there.'
Favourites Barcelona will meet Benfica in the quarter-finals of the UEFA Champions League.
Images from the English Premier League match between Arsenal and West Ham United on Tuesday.
Arsenal striker Eduardo da Silva has been handed a two-match ban for deceiving the referee in last week's Champions League play-off against Arsenal, UEFA said on Tuesday.
Arsenal eased past second-tier Reading 2-0 with Alex Oxlade-Chamberlain scoring twice, while Newcastle United romped to a 6-0 win over 10-man Preston North End and Hull City won 2-1 at Bristol City.
Bayern Munich winger Franck Ribery has been ruled out of their Champions League round of 16 second leg at home to Arsenal on Wednesday after picking up an ankle injury in the league on Saturday, the club said in a statement.
Napoli suffered an agonising exit from the Champions League after beating Premier League leaders Arsenal 2-0 on Wednesday.
Arsenal dealt Chelsea's title hopes a blow by holding the champions to a pulsating 1-1 draw.
Images from soccer matches held across Europe on Saturday, March 16.
Arsenal shoved Chelsea off the top of the table but Leicester City's Jamie Vardy, with a dazzling hat-trick, was the man of the moment on Saturday as the struggling Premier League champions blew aside Manchester City 4-2.
The Ivory Coast international gave the Londoners a 1-0 victory over Villarreal in the Champions League semi-final first leg.
Arsenal will man the barricades on Tuesday in anticipation of a Barcelona backlash while hoping that their second Champions League visit to the Nou Camp in less than a year will be less harrowing than the first.
A hat-trick from Nicklas Bendtner helped Arsenal to a 5-0 thumping of Porto on Tuesday as they overturned a first-leg deficit with nonchalant ease to reach the quarter-finals of the Champions League.
Former winners Borussia Dortmund host Arsenal in their Champions League Group F opener on Tuesday, with both sides desperate to drag themselves out of an early slump this season.
Arsenal beat Manchester United 1-0 to keep the Premier League title race wide open on Sunday with Aaron Ramsey's second-half winner cheered almost as loudly by Chelsea's fans as Arsenal's.
Wenger's future at Arsenal will be decided after FA Cup final
Chelsea moved 12 points clear of Arsenal, who suffered their fourth defeat in nine league matches, while fourth-placed Liverpool fell 13 point adrift after their wretched 2017 continued with a shock 2-0 defeat at resurgent Hull City.
Barcelona striker Zlatan Ibrahimovic has been ruled out for the visit of Arsenal in the Champions League next week after picking up a calf injury on Saturday, the club said in a statement.
Manchester United striker Robin van Persie will be treated with respect on his return to Arsenal, his former manager Arsene Wenger said on Thursday.
Cesc Fabregas scored twice to send Arsenal second in the Premier League, four points behind Chelsea but with a game in hand, after brushing aside Aston Villa 3-0 at the Emirates Stadium on Sunday.
Five-times winners Liverpool were knocked out of the Champions League in the group stages despite a 1-0 win at Debrecen on Tuesday while Fiorentina and Arsenal qualified for the last 16.
Paris St Germain will play Borussia Dortmund and Barcelona were pitted against an unpredictable Napoli, while Chelsea were drawn against Bayern Munich. City, who will be at home in the second leg, have yet to beat the Spanish side with two draws and two defeats in their previous four meetings.
Arsenal, Olympique Lyon and Villarreal try to venture into the unknown this week when the second legs of the Champions League quarter-finals take place.
A summary of Sunday's action in the Premier League.
Reading enjoyed a memorable first taste of the top flight when they beat Middlesbrough 3-2.
The injury comes at a bad time for Arsenal, who are third in the English Premier League and four points behind leaders Chelsea with 10 games remaining.
If the Premiership champions avoid defeat on Saturday against Leicester City they would become only the second team in history to complete an unbeaten top-flight season.
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.
Arsenal thrashed Middlesbrough 7-0, while Manchester United lost 3-1 at Manchester City in the Premier League.