American tennis player Sydney Dorcil has lost her appeal against a four-year doping ban imposed by the International Tennis Integrity Agency (ITIA).

The ITIA imposed the four-year sanction for a violation of the Tennis Anti-Doping Programme (TADP), as determined by an independent tribunal.

The 20-year-old tennis player, who was ranked 1255 in the WTA singles rankings as of January 2023, had tested positive for doping during an event in Lima, Peru, in November 2022.

The Court of Arbitration for Sport (CAS) upheld the International Tennis Integrity Agency's (ITIA) decision to suspend Dorcil until 12 January 2027 following her positive test for Boldenone and its metabolites at an ITF World Tennis Tour event in Lima, Peru, in November 2022.

The sports integrity agency said the player, who is now 21, failed to prove her claim that the presence of boldenone in her system was caused by a contaminated vitamin B12 injection.

CAS also found that the player failed to prove that her doping violation was unintentional, which could have reduced the suspension to two years under TADP rules. Those rules provide that the period of ineligibility for a player's first such violation is up to four years, unless the player can prove that the anti-doping rule violation was not intentional, in which case the period of ineligibility is up to two years.

During this four-year period, the player is prohibited from participating in or attending any tennis event sanctioned or approved by the governing bodies of tennis.