Nicholas Selson Gioacchini (born July 25, 2000) is an American professional soccer player who plays as a forward or a winger for Greek Super League club Asteras Tripolis.

[8] He made his debut for Caen in a 4–2 Ligue 2 win over his former club Paris FC on October 25, 2019, scoring his side's first goal in the 25th minute.

[citation needed] On July 20, 2022, it was announced Gioacchini had signed a two-and-a-half-year contract, plus an option for another year, with Orlando City of Major League Soccer.

[11] On January 24, 2024, Gioacchini joined Italian club Como for an undisclosed fee, signing a three-year-and-a-half contract.

[16] He received his first call up to the senior United States squad for matches against Wales and Panama in November 2020.