Sébastien Haller

Auxerre

During the 2011 FIFA U-17 World Cup, on 26 June 2011, Haller signed his first professional contract with Auxerre, agreeing to a three-year deal. Ahead of the 2012–13 season, Haller was promoted to the senior team by manager Jean-Guy Wallemme. His professional debut came on 27 July 2012, in the team's opening league match of the 2012–13 campaign against Nîmes.

Utrecht

On 24 December 2014, it was announced that Haller was sent on loan to Eredivisie club Utrecht until the end of the season. At the end of the season, it was announced that FC Utrecht had signed Haller. The supporters voted for Haller as the winner of the Di Tommaso Trophy 2015, Utrecht's player of the year award.

Eintracht Frankfurt

On 15 May 2017, Haller signed with Eintracht Frankfurt on a four-year deal for a reported fee of €7 million. In the 2017–18 DFB-Pokal, he scored four goals for Frankfurt, as the club won the final, marking the first trophy of Haller's career. In the 2018–19 Bundesliga season, he scored 15 league goals in 29 appearances as the club finished seventh. In addition to his goals scored, he also made nine assists, meaning he was involved in 24 goals, a figure only beaten in the 2018–19 season by Robert Lewandowski with 29.

West Ham United

On 17 July 2019, Haller signed with West Ham United on a five-year deal for a club record fee, that could rise to £45 million. He made his debut on 10 August, playing the full 90 minutes of a 5–0 Premier League…

Youth

Haller was a France youth international, having represented his country of birth at every youth level and totalling 51 caps and 27 goals. He played with the under-17 team at the 2011 FIFA U-17 World Cup in Mexico, scoring in a 3–0 win over Argentina in the opening group game. On 14 November 2013, Haller made his under-21 debut, coming on for Anthony Martial in the 57th minute against Armenia in a European qualifier in Toulouse and scoring to conclude a 6–0 win. He scored a hat-trick on 25 March 2015 in a friendly win of the same score against Estonia, and he did the same on 10 November 2016 in a 5–1 win over the Ivory Coast at the Stade Pierre Brisson.

Senior

In November 2020, Haller was called up to the Ivory Coast national team. He debuted in a 2–1 2021 Africa Cup of Nations qualification win over Madagascar on 12 November, scoring his side's game-winning goal in the 55th minute. He was called up for the finals in Cameroon, where he scored in a 2–2 group stage draw with Sierra Leone; in the last 16 against Egypt, he was substituted at half time in extra time for Maxwel Cornet as the side lost on penalties. In December 2023, he was named in the Ivorian squad for the 2023 Africa Cup of Nations hosted in his home nation. In the semi-final match against DR Congo, he scored the only goal in a 1–0 victory, which qualified his country to the final. He later scored the winning goal in the final match against Nigeria which ended in a 2–1 victory. However,…

Haller was born in Ris-Orangis, Essonne to a French father and an Ivorian mother.

In 2022 Haller was diagnosed with testicular cancer, which he overcame, returning to professional football in January 2023.