Born in Kaarina, Tenho played in various youth teams in Kaarina and Turku area, before starting his senior career with Åbo IFK in 2013, playing in the third-tier league Kakkonen.[4]
In the end of the 2018 season, TPS were once again relegated back to Ykkönen, and Tenho joined the local rival Veikkausliiga club Inter Turku on 3 January 2019,[6] after having represented TPS for five seasons.[7] Tenho played 31 games and scored twice for Inter Turku in all competitions combined, before leaving at the end of the year.
HJK Helsinki
HJK Helsinki confirmed on 4 November 2019, that Tenho would join the club for the 2020 season, signing a deal until the end of 2021.[8] He extended his contract with HJK on 28 June 2021, signing a deal until the end of the 2023 season.[9] Since the beginning of 2022, Tenho was the captain of the HJK team.[10][11] Tenho represented HJK in the group stages of UEFA Europa Conference League and UEFA Europa League in three consecutive seasons between 2021 and 2023.[12][13][14] During his time with the club, Tenho and HJK won four consecutive Finnish championship titles, one Finnish Cup and one Finnish League Cup.[15]
Djurgårdens IF
On 20 December 2023, it was announced that Tenho departed from HJK and had signed with Swedish Allsvenskan side Djurgården on a three-year deal, on a free transfer.[16][17] On 19 February 2024, Tenho made his official debut with Djurgården in a Svenska Cupen match against Skövde AIK, scoring a goal in a 2–0 win.[18] On 1 April 2024, Tenho made his Allsvenskan debut in the club's opening game of the season, scoring a goal in a 4–1 away win against IFK Göteborg.[19] Tenho played six cup matches and scored one goal, as Djurgården finished 2nd in the 2023–24 Svenska Cupen, after losing the final against Malmö FF on penalties.[20][21]
He made his national team debut on 26 March 2022, in a 1–1 friendly draw against Iceland.[23] Tenho made his competitive international debut on 14 June 2022, in a 3–2 away loss to Bosnia-Herzegovina in the 2022–23 UEFA Nations League B.[24] In addition, Tenho made his third international appearance on 19 November 2023, in a 4–0 home win against Northern Ireland, in the UEFA Euro 2024 qualifying campaign.[25]