2018 Champions

ATP
Rafael Nadal - ESP (4): French Open, Monte Carlo, Rome, Barcelona
Roger Federer - SUI (3): Australian Open, Rotterdam, Stuttgart
Juan Martin del Petro - ARG (2): Indian Wells, Acapulco
Alexander Zverev - GER (2): Madrid, Munich
Roberto Bautista Agut - ESP (2): Dubai, Auckland
Dominic Thiem - AUT (2): Buenos Aires, Lyon
Novak Djokovic - SRB (1): Wimbledon
John Isner - USA (1): Miami
Marin Cilic - CRO (1): London
Borna Coric - CRO (1): Halle
Diego Schwartzman - ARG (1): Rio de Janeiro
Kevin Anderson - RSA (1): New York
Pablo Andujar - ESP (1): Marrakech
Mirza Basic - BIH (1): Sofia
Roberto Carballes Baena - ESP (1): Quito
Marco Cecchinato - ITA (1): Budapest
Taro Daniel - JPN (1): Istanbul
Damir Dzumhur - BIH (1): Antalya
Fabio Fognini - ITA (1): Sao Paulo
Marton Fucsovics - HUN (1): Geneva
Richard Gasquet - FRA (1): 's-Hertogenbosch
Steve Johnson - USA (1): Houston
Karen Khachanov - RUS (1): Marseille
Nick Kyrgios - AUS (1): Brisbane
Daniil Medvedev - RUS (1): Sydney
Gael Monfils - FRA (1): Doha
Lucas Pouille - FRA (1): Montpellier
Gilles Simon - FRA (1): Pune
Joao Sousa - POR (1): Estoril
Frances Tiafoe - USA (1): Delray Beach
Mischa Zverev - GER (1): Eastbourne

WTA
Petra Kvitova - CZE (5): Doha, Madrid, St Petersburg, Birmingham, Prague
Elina Svitolina - UKR (3): Rome, Brisbane, Dubai
Elise Mertens - BEL (3): Hobart, Lugano, Rabat
Angelique Kerber - GER (2): Wimbledon, Sydney
Simona Halep - ROU (2): French Open, Shenzhen
Caroline Wozniacki - DEN (2): Australian Open, Eastbourne
Naomi Osaka - JPN (1): Indian Wells
Sloane Stephens - USA (1): Miami
Kiki Bertens - NED (1): Charleston
Karolina Pliskova - CZE (1): Stuttgart
Timea Babos - HUN (1): Taipei City
Ashleigh Barty - AUS (1): Nottingham
Julia Goerges - GER (1): Auckland
Aleksandra Krunic - SRB (1): 's-Hertogenbosch
Johanna Larsson - SWE (1): Nurnberg
Tatjana Maria - GER (1): Mallorca
Garbine Muguruza - ESP (1): Monterrey
Pauline Parmentier - FRA (1): Istanbul
Anastasia Pavlyuchenkova - RUS (1): Strasbourg
Anna Karolina Schmiedlova - SVK (1): Bogota
Lesia Tsurenko - UKR (1): Acapulco
Alison van Uytvanck - BEL (1): Budapest

Titles by Country
Spain (9): Nadal 4, Bautista Agut 2, Andujar, Carballes Baena, Muguruza
Czechia (6): Kvitova 5, Ka.Pliskova
Germany (7): Kerber 2, A.Zverev 2, Goerges, Maria, M.Zverev
France (5): Gasquet, Monfils, Parmentier, Pouille, Simon
Belgium (4): Mertens 3, van Uytvanck
Ukraine (4): Svitolina 3, Tsurenko
United States (4): Isner, Johnson, Stephens, Tiafoe
Argentina (3): del Potro 2, Schwartzman
Russia (3): Khachanov, Medvedev, Pavlyuchenkova
Switzerland (3): Federer 3
Australia (2): Barty, Kyrgios
Austria (2): Thiem 2
Bosnia and Herzegovina (2): Basic, Dzumhur
Croatia (2): Cilic, Coric
Denmark (2): Wozniacki 2
Hungary (2): Babos, Fucsovics
Italy (2): Cecchinato, Fognini
Japan (2): Daniel, Osaka
Romania (2): Halep 2
Serbia (2): Djokovic, Krunic
Netherlands (1): Bertens
Portugal (1): Sousa
Slovakia (1): Schmiedlova
South Africa (1): Anderson
Sweden (1): Larsson