Robert Lewandowski struck twice to steer champions Bayern Munich to a 2-1 win at Hamburg SV on Friday that stretched their lead at the top to 11 points as the Bundesliga resumed following a one-month winter break.
Lacazette fired the Gunners ahead in the eighth minute after poor defending by the home side before new signing Gabriel made it 2-0 in the 49th and Aubameyang put the icing on the cake with a superb shot into the top corner.
Juergen Klopp got a taste of the problems at Liverpool as his first home game as manager ended in a frustrating 1-1 draw against Rubin Kazan who played more than 50 minutes with 10 men in the Europa League on Thursday.
Arsenal finished eighth in the Premier League but their record 14th FA Cup triumph last Saturday ensured another year of European football and the possibility of earning up to 40 million pounds ($52.58 million) in the Europa League.
Tottenham Hotspur overcame a worrying injury to talismanic striker Harry Kane to beat mid-table Bournemouth 4-1 with a Son Heung-min double and goals from Dele Alli and Serge Aurier to move up to third in the Premier League.
Manchester City made it five wins out of five in the Premier League and Cristiano Ronaldo scored five goals for Real Madrid but Chelsea and Juventus continued to struggle at the weekend as the Champions League looms.
Borussia Dortmund missed a bagful of chances to draw 1-1 at home with Augsburg on Tuesday, as they squandered the opportunity to make up ground in the Bundesliga title race heading into the winter break.
Pierre-Emerick Aubameyang missed a penalty before scoring an 80th-minute equaliser as an injury-hit Borussia Dortmund failed to win for the second straight game after stumbling to a 1-1 home draw against Hertha Berlin on Friday.
'We changed our attitude, desire and organisation at halftime and then we were completely different. It was good for my players to learn and to suffer on the pitch'
Images from Sunday's action in the Premier League.
Arsenal finally halted their seven-match losing streak, to go up to ninth spot with 22 points from 16 games in the Premier League table on Monday.
Japan international Shinji Kagawa sparkled on his return to Borussia Dortmund, scoring one goal for the Ruhr Valley club and helping set up another in a 3-1 win over Freiburg on Saturday.
Barcelona were held 1-1 at home by Napoli in the first leg of their Europa League knockout stage playoff
Arsenal manager Unai Emery was pleased with his team's first away clean sheet of the season.
London sides Tottenham Hotspur and Arsenal made winning starts as did fellow Premier League club Leicester City.
Manchester City have signed French central defender Aymeric Laporte from Spanish club Athletic Bilbao, the Premier League leaders said on Tuesday.
Bayern Munich scraped past Hertha Berlin 1-0 on Saturday.
Images from Saturday's action in the Premier League.
Title contenders Borussia Dortmund twice hit the woodwork as they beat Freiburg 3-1 to join leaders Bayern Munich at the top of the Bundesliga.
Arsenal turned around its recent poor form to beat Leicester 3-1 on Sunday
Yaya Toure was named African Footballer of the Year for a record fourth straight time at the annual Confederation of African Football awards on Thursday.
Dortmund's Ciro Immobile hadn't scored since joining the club this season. But while he was getting restless, the striker was asked by coach Juergen Klopp to be patient and persistent.
Roberto Firmino's 90th-minute header sent Liverpool back to the top of the Premier League with a 2-1 victory over Tottenham Hotspur, whose 11-match unbeaten run came to an end on Wednesday.
Second-placed Borussia Dortmund beat hosts Mainz 05 2-0 on Friday in coach Thomas Tuchel's return to his former club, ending their three-game winless run in the Bundesliga to close in on leaders Bayern Munich.
IMAGES from the soccer matches played across European leagues over the weekend.
Manchester United remain winless at home in the league this season after Arsenal enjoyed their first win at Old Trafford
Leicester City's Jamie Vardy ended his long scoring drought with two goals after coming off the bench as they returned to winning ways with a 4-0 drubbing of Premier League strugglers Aston Villa at the King Power Stadium on Monday.
Inter Milan midfielder Christian Eriksen scored his first goal for the club since last month's move from Tottenham Hotspur to set up a 2-0 win at Ludogorets Razgrad in their Europa League last 32, first leg on Thursday. Getafe pulled off a surprise 2-0 home win over last year's Champions League semi-finalists Ajax Amsterdam, while Manchester United were held 1-1 at Club Brugge in wet and windy conditions. Wolverhampton Wanderers' Diogo Jota scored a second successive hat-trick in the competition to lead his side to a 4-0 victory over Espanyol and Arsenal won 1-0 at Olympiakos Piraeus with a late Alexandre Lacazette goal.
Arsenal's Aubameyang compared to Henry after his derby double
A dreadful defensive error from Arsenal's Granit Xhaka gifted Burnley an equaliser as the sides drew 1-1 at Turf Moor in the Premier League on Saturday.
IMAGES from the English Premier League matches played on Wednesday.
African Nations Cup underdogs Congo boosted their hopes of reaching the quarter-finals after they beat more fancied Gabon 1-0 to throw Group A wide open on Wednesday.
Ferran Torres scored a brace and Ousmane Dembele made two assists as a red-hot Barcelona rolled over Osasuna 4-0 on Sunday to earn their fourth consecutive LaLiga win.
Images from Saturday's third round matches in the FA Cup.
Teenager Kylian Mbappe scored twice to give AS Monaco a 3-2 win at Borussia Dortmund on Wednesday in a Champions League quarter-final first-leg match that was postponed following an attack on the home team's bus.
Romelu Lukaku struck twice as Manchester United returned to winning ways after two successive Premier League losses with a 2-0 victory over Burnley at Turf Moor on Sunday.
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.
Atletico Madrid substitute goalkeeper Antonio Adan saved three penalties before blasting home the winning spot-kick as the Europa League champions edged out Arsenal after the sides drew 1-1 in their International Champions Cup opener in Singapore on Thursday.
IMAGES from the EPL matches played on Wednesday.
Juergen Klopp's side returned to English Premier League action on Friday with a hunger and desire that suggested they have spent the close-season break chomping at the bit to get back on the field.