Early career Born in
Johannesburg, South Africa, of
Swiss descent, Untersee moved to Switzerland at a very young age and opted to represent
Switzerland at various youth levels internationally. Following his move, Untersee joined the youth academy of
FC Zürich, where he would eventually remain until 2010, before transferring to
Italian giants,
Juventus Football Club during the 2010–11 season.
Juventus On 28 October 2010, Untersee officially left FC Zürich to join Juventus, where he was assigned to the
youth team. After a successful debut season in Italy, Untersee was called up to the first team training camp in the summer 2011 by new head coach
Antonio Conte. Following the summer
ritiro, however, the young fullback returned to the youth sector for the 2011–12 season and remained during the 2012–13 campaign as well. On 1 January 2014,
Juventus confirmed that Untersee had left them for
FC Vaduz on a six-month loan deal that would expire on 30 June 2014. Instantly making an impact with his new team, Untersee made his first appearance against
FC Lugano in a 2–0 home victory on 3 February 2014. He went on to make 15 league appearances. Additionally, he scored his first goal for his new club in an 8–0 victory over
FC Ruggell in the
Liechtenstein Football Cup. On 3 July 2014, Juventus and Vaduz reached an agreement to prolong the loan deal for another season.
Brescia On 31 August 2016, Untersee completed a move to Italian club
Brescia on a loan deal from Juventus for the full season. He made his debut in a 2–0
Serie B win over
Frosinone, playing the full 90 minutes
Empoli After one year contract, in January 2019, he was loaned to Zürich until the end of the season.
HJK On 19 January 2021, Untersee signed a one-year contract with
HJK. Untersee left HJK on 23 July 2021 by mutual consent, having made four appearances for the club in the
Finnish Cup. ==International career==