Žiga Šeško (born 27 July 2008) is a Slovenian tennis player. He has a career-high ATP singles ranking of No. 688 achieved on 14 September 2026 and a doubles ranking of No. 1,246 achieved on 8 June 2026. Šeško won the singles title at the 2026 Australian Open and the 2026 Wimbledon doubles title, becoming the first Slovenian player to win a Junior Grand Slam title.
Early life Šeško was born and raised in Hrastnik, Slovenia. His father, Dejan Šeško, is a former table tennis player who introduced Žiga to tennis. He is a distant relative of Slovenian professional footballer Benjamin Šeško; although the two do not know each other personally, their families originate from neighboring towns in the Zasavje region.
Juniors In December 2025, Šeško won the prestigious Orange Bowl in the boys' doubles, playing alongside Yannik Álvarez.
In January 2026, Šeško won the doubles category at J300 Traralgon International, Australia, with Luís Guto Miguel. His best result at junior-level came two weeks later, when he was crowned a champion at the Australian Open Boys' singles, with victories over second seed and doubles partner Luís Guto Miguel, third seed Ryo Tabata, and fourth seed Keaton Hance, winning the final in three sets, 4–6, 6–3, 6–4. Seeded seventh, he became the first Slovenian player in history to win a boys' final in either singles or doubles in any Grand Slam tournament.
Šeško has good results on the ITF junior circuit, holding a singles win-loss record of 110–57 as of February 2026. He reached an ITF junior combined ranking of world No. 4 on 2 February 2026.
Professional Šeško reached his first professional singles final in November 2025 at the M15 tournament in San Gregorio di Catania, Italy. He defeated top seed Gabriele Pennaforti in the quarterfinals before losing the final to Gianmarco Ferrari in straight sets.
He won his first doubles title in June 2024 at the M15 in Hrastnik, partnering with Nik Razboršek. He claimed his second title in June 2025 at the M15 Ljubljana, playing alongside Jan Kupčič. In 2026, Šeško was entered as a wildcard in the qualifying draw in Mallorca. He made his ATP debut having also received a wildcard for the main draw draw at the 2026 Croatia Open Umag.Šeško ITF Profile
Personal life Šeško trained at Gimnazija Litija (Litija Grammar School), completing his education remotely to accommodate his training schedule. He is based in Bordighera, Italy, where he trains at the Piatti Tennis Center under coach Riccardo Piatti.
ITF World Tennis Tour finals
Singles: 3 (1 title, 2 runner-ups)
Finals by surfaceHard (–)Clay (1–2)
ResultW–LDateTournamentSurfaceOpponentScoreLoss0–1M15 San Gregorio di Catania, ItalyClay Gianmarco Ferrari4–6, 2–6Win1–1M15 Wels, AustriaClay Erik Schiessl7–6(7–4), 6–4Loss1–2M15 Trier, GermanyClay Michael Agwi2–6, 1–6
Doubles: 2 (2 titles)
Finals by surfaceHard (–)Clay (2–0)
ResultW–LDateTournamentSurfacePartnerOpponentsScoreWin1–0M15 Hrastnik, SloveniaClay Nik Razboršek Jan Kupčič Nikola Bašić7–6(7–4), 6–4Win2–0M15 Ljubljana, SloveniaClay Jan Kupčič Théo Papamalamis Glib Sekachov6–3, 6–3
Junior Grand Slam finals
Singles: 1 (title) ResultYearTournamentSurfaceOpponentScoreWin2026Australian OpenHard Keaton Hance4–6, 6–3, 6–4
Doubles: 1 (title) ResuYearTournamentSurfacePartnerOpponentsScoreWin2026WimbledonGrass Luís Guto Miguel Michael Antonius Andrew Johnson6–1, 6–4
National representation
Davis Cup: 2 (1 victory, 1 loss) Group membershipWorld Group (–)World Group I (0–1)World Group II (1–0)Matches by surfaceHard (1–0)Clay (0–1)Grass (–)Matches by typeSingles (1–0)Doubles (0–1)
indicates the outcome of the Davis Cup match followed by the score, date, place of event, the zonal classification and its phase, and the court surface.
ResultRubberMatch type (partner if any)Opponent nationOpponent player(s)Score4–1; 12–13 September 2025; Tennis Academy Breskvar, Ljubljana, Slovenia; World Group II; hard surfaceWinIVSingles UruguayFrancisco Llanes1–6, 7–6(7–4), 10–71–3; 6–7 February 2026; Bela dvorana, Velenje, Slovenia; World Group I play-offs; clay surface (i)LossIIIDoubles(w Filip Jeff Planinšek) TurkeyErgi KırkınKerem Yılmaz6–7(3–7), 3–6
References
External links