Gabriel Teodoro Martinelli Silva (born 18 June 2001) is a Brazilian professional footballer who plays as a forward for Premier League club Arsenal and the Brazil national team.

[6] He made his professional debut the following 17 March, coming on as a late substitute for goalscorer Claudinho in a 2–1 Campeonato Paulista away win against São Bento; at the age of 16 years and nine months, he became the youngest player to play for the club in the century.

[8] Definitively promoted to the first team for the 2019 Campeonato Paulista, he scored six goals during the competition, being the club's top goalscorer as they reached the quarterfinals; highlights included a brace in a 3–0 away win against Bragantino on 15 March 2019.

[9] Holding an Italian passport, Martinelli was not subject to the scrutinised criteria required for English clubs to sign South American players.

[13] Martinelli made his Premier League debut on 11 August 2019 in a 1–0 win against Newcastle United, coming on in the 84th minute as a substitute for Henrikh Mkhitaryan.

[15] Martinelli made his second start for Arsenal in a 4–0 home win over Standard Liège in the UEFA Europa League on 4 October, in which he scored another brace.

[22] After the appointment of interim head coach Freddie Ljungberg, Martinelli started his first Premier League game, scoring Arsenal's equaliser in an eventual 1–3 win over West Ham United on 9 December.

On 21 January 2020, Martinelli scored in a 2–2 away draw at Chelsea, making him the first teenager to reach double figures in a season for Arsenal since Nicolas Anelka.

[23] Picking the ball up outside the Arsenal box following a headed clearance from a corner, Martinelli ran the length of the pitch outpacing Chelsea defenders to slot past Kepa Arrizabalaga.

[39] Before the conclusion of the 2021–22 season, Martinelli was handed the number 11 shirt pending the departure of Lucas Torreira to Galatasaray in the summer transfer window.

On 5 August 2022, Martinelli scored for Arsenal in their 2–0 away win at Crystal Palace, becoming the first Brazilian to net a season-opening goal of a Premier League campaign.

[46] On Boxing Day, Martinelli scored in Arsenal's first Premier League match since the conclusion of the 2022 FIFA World Cup, a 3–1 win over West Ham.

[53] On 12 August 2023, in Arsenal's first match of the 2023–24 Premier League season, Martinelli assisted Eddie Nketiah by pirouetting past Serge Aurier & Danilo Oliveira in a 2–1 home win against Nottingham Forest.

[55] On 8 October, Martinelli came on as a substitute and scored the only goal of the game in a 1–0 victory over Manchester City with the help of a deflection off defender Nathan Aké, as Arsenal sealed their first league win against their opponents since 2015.

[73] A dynamic and explosive wide forward known for his agile movement, acceleration and speed, Martinelli can dribble past multiple opponents to create or score goals.