On 6 August 2017, Lacazette made his first appearance for Arsenal in the 2017 FA Community Shield against Chelsea.
Despite hitting the post midway through the first half, Arsenal eventually won 4–1 on penalties after the game ended 1–1 at full time.
This win constituted his first trophy win at Arsenal.
On 11 August, Lacazette made his Premier League debut against Leicester City and scored after 94 seconds to give Arsenal a 1–0 lead in an eventual 4–3 win.
Lacazette also managed to score in both of Arsenal's next home games, scoring Arsenal's second in a 3–0 win over Bournemouth, before grabbing a brace for the club in a 2–0 win over West Bromwich Albion.
With his goals against West Brom, Lacazette became the first Arsenal player to score in his first three home league appearances for the club since Brian Marwood in September 1988.

Lacazette scored his first away goal for Arsenal, in the team's 5–2 win against Everton at Goodison Park, latching onto a pass from Mesut Özil, to score Arsenal's third.
Lacazette claimed his 6th goal of the season in Arsenal's 3–1 away defeat to Manchester City after latching onto an Aaron Ramsey pass, despite not starting the game.
In November, Lacazette scored Arsenal's opening goal in a 5–0 rout of Huddersfield Town and in December, he scored Arsenal's only goal in a 3–1 home defeat to Manchester United.

Following a protracted period on the sidelines through injury, Lacazette returned to the Arsenal squad in the 3–0 home win over Stoke City in March, where he replaced Danny Welbeck in the 61st minute and scored the Gunners' third goal of the game, after new signing and designated penalty-taker Pierre-Emerick Aubameyang, allowed Lacazette to take the penalty.
Lacazette would then score twice on his Europa League debut for Arsenal, in a 4–1 win against CSKA Moscow, marking his first goal in European competition for the club.
Lacazette then registered his third goal in European football for Arsenal, by scoring in the Europa League semi-final 1–1 draw with Atlético Madrid.
The goal was Lacazette's seventh goal in seven games for the club since returning from injury.
Lacazette scored in Arsène Wenger's final home match, a 5–0 rout of Burnley, the team's second goal and his fourteenth league goal of the season, Lacazette also picked up an assist for the team's opening goal as well.
On 6 August 2017, Lacazette made his first appearance for Arsenal in the 2017 FA Community Shield against Chelsea. Despite hitting the post midway through the first half, Arsenal eventually won 4–1 on penalties after the game ended 1–1 at full time. This win constituted his first trophy win at Arsenal. On 11 August, Lacazette made his Premier League debut against Leicester City and scored after 94 seconds to give Arsenal a 1–0 lead in an eventual 4–3 win. Lacazette also managed to score in both of Arsenal's next home games, scoring Arsenal's second in a 3–0 win over Bournemouth, before grabbing a brace for the club in a 2–0 win over West Bromwich Albion. With his goals against West Brom, Lacazette became the first Arsenal player to score in his first three home league appearances for the club since Brian Marwood in September 1988.
Lacazette scored his first away goal for Arsenal, in the team's 5–2 win against Everton at Goodison Park, latching onto a pass from Mesut Özil, to score Arsenal's third. Lacazette claimed his 6th goal of the season in Arsenal's 3–1 away defeat to Manchester City after latching onto an Aaron Ramsey pass, despite not starting the game. In November, Lacazette scored Arsenal's opening goal in a 5–0 rout of Huddersfield Town and in December, he scored Arsenal's only goal in a 3–1 home defeat to Manchester United.
Following a protracted period on the sidelines through injury, Lacazette returned to the Arsenal squad in the 3–0 home win over Stoke City in March, where he replaced Danny Welbeck in the 61st minute and scored the Gunners' third goal of the game, after new signing and designated penalty-taker Pierre-Emerick Aubameyang, allowed Lacazette to take the penalty. Lacazette would then score twice on his Europa League debut for Arsenal, in a 4–1 win against CSKA Moscow, marking his first goal in European competition for the club. Lacazette then registered his third goal in European football for Arsenal, by scoring in the Europa League semi-final 1–1 draw with Atlético Madrid. The goal was Lacazette's seventh goal in seven games for the club since returning from injury. Lacazette scored in Arsène Wenger's final home match, a 5–0 rout of Burnley, the team's second goal and his fourteenth league goal of the season, Lacazette also picked up an assist for the team's opening goal as well.
Alexandre Lacazette