Serhou Yadaly Guirassy (born 12 March 1996) is a French-born Guinean professional footballer who plays as a striker for Bundesliga club Borussia Dortmund and the Guinea national team.

[16] On 15 February 2020, he scored a brace in a 4–4 draw against Paris Saint-Germain, with his second goal equalized the match in the stoppage time.

[24] In the 2023–24 season, Guirassy scored ten goals in the first five matches, including his first Bundesliga hat-trick which came against Mainz, to equal a previous record set by Robert Lewandowski in 2020–21.

[11] He also set the Bundesliga record for most goals by a player in the first seven matches of a season by scoring a hat-trick within 15 minutes in a 3–1 win against Wolfsburg.

[25] After scoring his 14th goal of the season in an away match against Union Berlin, he was substituted after 30 minutes of play due to a hamstring injury.

[31] Additionally, he scored the opening goal for the 12th time that season during the match, tying a Bundesliga record set by Gerd Müller in 1969–70, Ailton in 2003–04 and Stefan Kießling in 2012–13.

[33] On 18 July 2024, Guirassy signed a four-year contract with Borussia Dortmund for a reported transfer fee of €18 million.

[34][35] Later that year, on 18 September, he scored his first goal from a penalty in a 3–0 away win over Club Brugge in the Champions League group stage.

He debuted in the Guinea national team in a 0–0 friendly draw against South Africa on 25 March 2022, held in Kortrijk, Belgium.