A professional tennis player is not retired when she or he plays a last match or says goodbye on court. Under the Tennis Anti-Doping Programme, a player is retired when written notice reaches the sport’s governing bodies. From that date the player is out of the testing pool, and a return to competition requires six months’ written notice and six months of availability for drug testing.
The rule came into view in October 2026, when the International Tennis Integrity Agency listed Gael Monfils among the players who have declared themselves retired, with his career officially over from October 5. The 40-year-old Frenchman had said 2026 would be his last season, had a wild card for the Lyon tournament and was widely expected to finish at the Paris Masters. Lyon organisers said he would not play, citing “personal reasons,” and Monfils has not publicly confirmed his retirement.
What the rule says
Retirement is covered by Article 1.4 of the 2026 Tennis Anti-Doping Programme, which the ITIA administers. Its main parts:
- Notice decides the date. A player stays bound by the programme until giving written notice of retirement. An international-level player sends it to the ITF, the ITIA and the ATP or WTA. Retirement takes effect on the date in the notice or the date it is received, whichever is later (Article 1.4.1).
- Six months to come back. A retired player may not compete in any covered event or national-level event without first giving the ITF, the ITIA and their national anti-doping organisation at least six months’ written notice of an intent to return, and being available for testing, including whereabouts information if requested, for those six months (Article 1.4.3). Results obtained in breach of the rule can be disqualified.
- One exemption. WADA, after consulting the ITIA and the player’s national anti-doping organisation, may waive the six-month notice where applying it strictly would be unfair to the player. That decision can be appealed (Article 1.4.4).
- Retiring while suspended. A player who retires during a period of ineligibility must give notice of six months or of the remaining ban, whichever is longer, before returning (Article 1.4.5).
- Entries during the wait. A returning player may enter an event whose entry deadline falls inside the six-month period (Article 1.4.6).
- The past still counts. The ITF, the ITIA, the tribunals and the Court of Arbitration for Sport keep jurisdiction over anything that happened before retirement, and retired players must cooperate with investigations into it (Articles 1.4.7 and 1.4.8).
Why a farewell event cannot come after the notice
The order matters. Once a retirement notice has taken effect, the player is outside the testing programme, and the only route back is the six-month return. A player who wants a final tournament has to play it before the notice takes effect. That is why a Monfils comeback is unlikely: anyone on the ITIA’s retired list needs six months of testing availability before being allowed to compete again.
The tours apply the same principle to their own entry rules. Under WTA rules, players who have retired may not receive a wild card until they have satisfied the anti-doping testing requirements, so a tournament cannot use a wild card to bring back a player still inside the waiting period.
Why the notice matters the other way
The rule also stops a player from escaping the programme by simply drifting away from the tour. Until the written notice arrives, the player remains subject to testing and to the anti-doping rules. The ITIA relied on that in its case against former player Marinko Matosevic, arguing before an independent tribunal that the rules continue to apply until a player’s written notice of retirement has been received. Matosevic did not give formal retirement notice until November 1, 2024. In March 2026 he was suspended for four years for multiple anti-doping breaches.
Retiring from a match is different
The word means something else on the scoreboard. A player who stops during a match because of injury or illness has retired from that match only; it is recorded as a loss and has no effect on anti-doping status. Walkover vs Retirement vs Default explains how those results are scored, and How Tennis Anti-Doping Rules Work covers the wider programme, including testing and sanctions. ITIA Provisional Suspension Explained sets out what happens when a case is opened.
What is known about Monfils
Monfils, a former world No. 6, won 13 titles and reached the semifinals at the 2008 French Open and the 2016 US Open. His last Grand Slam match was a second-round loss to Learner Tien at the US Open in September; earlier in that tournament he became the oldest man to win a match there since Jimmy Connors in 1992. He was ranked No. 254 when the ITIA listing became public, and he has signed with a Swiss company to work in wealth management. He has not explained the timing of his retirement.
