Gustav Erik Ludwigson (born 20 October 1993) is a Swedish footballer who plays as a forward or as a second striker for K League 1 club Ulsan Hyundai.

[10][11] In his debut season in 2020, Ludwigson scored nine goals and provided 11 assists in 29 league games, being voted as Hammarby Player of the Year by the supporters of the club, although the side disappointedly finished 8th in the Allsvenskan table.

[13] On 30 May 2021, Ludwigson won the 2020–21 Svenska Cupen, the main domestic cup, with Hammarby through a 5–4 win on penalties (0–0 after full-time) against BK Häcken in the final.

[23] Ludwigson featured in the final of the 2021–22 Svenska Cupen, in which Hammarby lost by 4–5 on penalties to Malmö FF after the game ended in a 0–0 draw.

[26][27] The transfer fee was reportedly set at around 6 million SEK, after the Korean club activated a release clause in Ludwigson's contract.