Aapo Nukkumatti Riikonen — a professional Dota 2 player from Finland who plays the position four support role.

He began his esports career in May 2019 as part of the stack The Astronauts. With this team, he earned his first prize money, finishing as a finalist at the Epulze Monthly May 2020 tournament. In the spring of 2020, Aapo left the team and played for several other squads. With Cheeky Chums, he placed fourth at ESL Premiership 2020 Spring, and while playing for HAVU Gaming, he finished in the top four at Epulze Global League Season 2.

In April 2021, Nukkumatti joined Ad Honores to compete in FroggedTV League Season 7, where the team claimed victory. Later, he moved to DIVIZION, with which he placed in the top six at ESL Meisterschaft Spring 2021 and ESL Meisterschaft Autumn 2021. At the end of the year, Aapo returned to Ad Honores, won FroggedTV League Season 8, and finished third in the 9th season of the tournament.

In mid-2022, Nukkumatti began playing for 11Monkeyz. With this team, he placed in the top six at DPC WEU 2021/2022 Tour 3: Division II and European Pro League Season 2, took first place at Summer Wave, and finished in fourth place in 1x Series. In September of that year, he left the team.

In 2023, Nukkumatti was largely absent from the professional Dota 2 scene. In the summer of 2024, he made his return by joining 9class ate my homework, with whom he advanced to the closed North American qualifiers for PGL Wallachia Season 2.