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.
Tottenham Hotspur showed the English Premier League title race might not be just a two-horse affair with a hugely impressive 6-2 win at Everton.
Images from Saturday's action in the English Premier League.
Striker Mariano's header was glanced onto the crossbar by Sociedad's Andoni Gorosabel while the loose ball fell to Marco Asensio, whose shot was deflected wide for a corner from which Raphael Varane header hit the top of the bar.
Bayern Munich thrashed Bayer Leverkusen 5-1, while Barcelona came from behind to beat Valencia 3-1 in LaLiga at Camp Nou on Sunday.
Pierre-Emerick Aubameyang scored twice to earn Arsenal a 3-2 Premier League win over Everton on Sunday, extending the Gunners' unbeaten start to 2020 and moving them back into the battle for European places. The win lifts Mikel Arteta's Arsenal side up to ninth place in the league with 37 points, while Everton remain without a victory at the Gunners in 24 years and a point adrift in 11th.
Images from the UEFA Champions League matches played on Tuesday
Champions Manchester City have won their last 10 home league matches scoring a total of 36 goals.
Images from the English Premier League matches played on Saturday.
'Just hard work and be honest to what you are doing, that's all'
IMAGES from Europa League matches played on Thursday.
Olympique de Marseille stretched their Ligue 1 lead to four points after man of the match Florian Thauvin and Rod Fanni clinched a 2-0 home win over Nantes on Friday.
Manchester United completed their first home and away Premier League double over Manchester City since the Alex Ferguson era with a 2-0 victory at Old Trafford on Sunday.. Earlier, two goals in each half from a rampant Chelsea earned them a 4-0 victory over Carlo Ancelotti's Everton, cementing their place in the Premier League's top four.
Ronaleo netted his 14th league goal for Juve this season while PSG's winning streak was snapped by Monaco in a 3-3 draw. Here are images from the matches played on Sunday
James Rodriguez netted twice and Dominic Calvert-Lewin became the first Everton player to score in the opening four matches of a Premier League season as they beat Brighton & Hove Albion 4-2 on Saturday to stay top of the table with a maximum 12 points.
Manchester United closed in on the Premier League's pole position after a 2-1 home win over Aston Villa on Friday put them level on points and games played with champions and leaders Liverpool.
Liverpool opened up an eight-point lead at the top of the Premier League with an emphatic and hugely impressive 3-1 win over defending champions Manchester City.
Everton and Manchester United drew 1-1 at Goodison Park in the Premier League on Sunday in an enthralling game which ended with late VAR drama.
Coming off heartbreaking losses, the Indian Premier League game between Mumbai Indians and Kings XI Punjab will be a test of character for both sides as they look to get back to winning ways, in Abu Dhabi, on Thursday.
A 20-year-old British Muslim was on Wednesday sentenced to six years in jail for making determined efforts to join the Islamic State in Syria.
Paris St Germain's Zlatan Ibrahimovic was again in a class of his own as the striker's hat-trick earned a 3-1 win against Nice and a four-point lead in Ligue 1 on Saturday.
An impressive England advanced to their first World Cup semi-final for 28 years on Saturday after headers by Harry Maguire and Dele Alli gave them a deserved 2-0 last-eight victory over a disappointing Sweden.
Images from the EPL matches played on Saturday
Images from the FIFA World Cup qualifiers matches.
Bournemouth breathed life into their Premier League survival bid on Sunday, coming from a goal down to beat fourth-placed Leicester City 4-1 for their first win in 10 games. Toby Alderweireld's 81st-minute header sealed a 2-1 Premier League victory for Tottenham Hotspur against Arsenal in the first north London derby in their new stadium on Sunday.
Christina Aguilera's wedding dress has been voted the best bridal gown in a new poll. The others are Marcia Cross, Avril Lavigne, Christine Baumgartner (Mrs Kevin Costner) and Gwen Stefani
Images from the UEFA Champions League matches played on Wednesday night.
Cristiano Ronaldo scored twice as Juventus strolled to a 3-0 home win over bottom side Crotone in the Italian Serie A on Monday, with the victory taking the champions up to third in the standings.
India remained winless in their qualifying campaign so far.
Giroud scored with an improvised volley in the Premier League match on Jan. 1, producing an acrobatic flick with his left heel to convert Alexis Sanchez's cross into the net off the crossbar while tumbling forward.
Sadio Mane struck four minutes into stoppage time to give Liverpool a last-gasp 1-0 win over derby rivals Everton that lifted them into second place in the English Premier League.
IMAGES from the English Premier League matches played on Wednesday
Images from Sunday's action in La Liga, Serie A and Ligue 1.
Liverpool took the lead against West Ham United but then had to come from behind in another game of thrills and spills for Juergen Klopp's unpredictable side who where held to a 2-2 home draw in the Premier League on Sunday.
Everton have 36 points from 26 games
Chelsea manager Antonio Conte was fuming at the final whistle after Pedro and Alvaro Morata were dismissed in extra time and two penalty appeals had been waved away, but the Premier League champions regained their composure to win the shootout 5-3.
Oman made a late comeback to defeat India 2-1 in the opening Group E match of the 2022 FIFA World Cup and the 2023 AFC Asian Cup Joint-Qualifiers at the Indira Gandhi Athletic Stadium in Guwahati, on Thursday.
Liverpool overcame another obstacle on the path to what looks an almost certain Premier League title triumph as they chalked up a record-breaking 20th win
The 23-year-old world champion crossed the line in the Ras al-Khaimah half marathon three seconds quicker than the mark set by fellow Kenyan Florence Kiplagat in Barcelona two years ago, although the new record remains subject to ratification.
Rohit Sharma blasted an unbeaten century to power India to a seven-wicket victory which helped the visitors clinch the three-match T20 International series against England 2-1.
