Settimana | Torneo | Campione | Finalista | Semifinalisti | Eliminati ai quarti |
1 maggio | Ostrava Open Challenger Ostrava, Repubblica Ceca €64,000+H – Terra rossa – 32S/32Q/16D
| Stefano Travaglia 6–2, 3–6, 6–4 | Marco Cecchinato | Attila Balázs Adam Pavlásek | Marco Trungelliti Simone Bolelli Roberto Carballés Baena Stefano Napolitano |
Jeevan Nedunchezhiyan Franko Škugor 6–3, 6–2 | Rameez Junaid Lukáš Rosol |
Savannah Challenger Savannah, Stati Uniti $75,000 – Terra verde– 32S/32Q/16D
| Tennys Sandgren 6–4, 6–3 | João Pedro Sorgi | James McGee Tommy Paul | Marcos Giron Stefan Kozlov Dennis Novikov Henri Laaksonen |
Peter Polansky Neal Skupski 4–6, 6–3, [10–1] | Luke Bambridge Mitchell Krueger |
Gimcheon Open Gimcheon, Corea del Sud $50,000+H – Cemento – 32S/32Q/16D
| Thomas Fabbiano 7–5, 6–1 | Tejmuraz Gabašvili | Blaž Kavčič Konstantin Kravčuk | Marco Chiudinelli Akira Santillan Vasek Pospisil Liam Broady |
Marco Chiudinelli Tejmuraz Gabašvili 6–1, 6–3 | Ruan Roelofse Yi Chu-huan |
8 maggio | Open du Pays d'Aix Aix-en-Provence, Francia €127,000+H – Terra rossa – 32S/32Q/16D
| Frances Tiafoe 6–3, 4–6, 7–6(5) | Jérémy Chardy | Reilly Opelka Pedro Sousa | Malek Jaziri Quentin Halys Bjorn Fratangelo Julien Benneteau |
Wesley Koolhof Matwé Middelkoop 2–6, 6–4, [16–14] | Andre Begemann Jérémy Chardy |
Seoul Open Challenger Seul, Corea del Sud $100,000+H – Cemento – 32S/32Q/16D
| Thomas Fabbiano 1–6, 6–4, 6–3 | Kwon Soon-woo | Ruben Bemelmans Lee Duck-hee | Hiroki Moriya Gō Soeda Dudi Sela Alexander Sarkissian |
Hsieh Cheng-peng Peng Hsien-yin 5–1 rit. | Thomas Fabbiano Dudi Sela |
Karshi Challenger Karshi, Uzbekistan $75,000+H – Cemento – 32S/32Q/16D
| Jahor Herasimaŭ 6–3, 7–6(4) | Cem İlkel | Yuki Bhambri Dmitrij Popko | Serhij Stachovs'kyj Jaraslaŭ Šyla Oleksandr Nedovjesov Aleksandr Kudrjavcev |
Denys Molčanov Serhij Stachovs'kyj 6–4, 7–6(7) | Kevin Krawietz Adrián Menéndez Maceiras |
Roma Open Roma, Italia €64,000+H – Terra rossa – 32S/32Q/16D
| Marco Cecchinato 6–4, 6–4 | Jozef Kovalík | Kimmer Coppejans Yannick Maden | Stefanos Tsitsipas Riccardo Bellotti Stefano Travaglia Gianluigi Quinzi |
Andreas Mies Oscar Otte 4–6, 7–6(12), [10–8] | Kimmer Coppejans Márton Fucsovics |
15 maggio | Busan Open Challenger Pusan, Corea del Sud $150,000+H – Cemento – 32S/32Q/16D
| Vasek Pospisil 6–1, 6–2 | Gō Soeda | Kwon Soon-woo Dudi Sela | Lu Yen-hsun Matthew Ebden Austin Krajicek Tatsuma Itō |
Hsieh Cheng-peng Peng Hsien-yin 7–5, 4–6, [10–8] | Sanchai Ratiwatana Sonchat Ratiwatana |
Tournoi International de Tennis de Bordeaux Bordeaux, Francia €106,000+H – Terra rossa – 32S/32Q/16D
| Steve Darcis 7–6(2), 4–6, 7–5 | Rogério Dutra da Silva | Arthur De Greef Benjamin Bonzi | Maxime Janvier Bjorn Fratangelo Julien Benneteau Dušan Lajović |
Purav Raja Divij Sharan 6–4, 6–4 | Santiago González Artem Sitak |
Heilbronner Neckarcup Heilbronn, Germania €64,000+H – Terra rossa – 32S/32Q/16D
| Filip Krajinović 6–3, 6–2 | Norbert Gombos | Lorenzo Giustino Guido Pella | Andrej Martin Casper Ruud Márton Fucsovics Marco Cecchinato |
Roman Jebavý Antonio Šančić 6–4, 6–1 | Adil Shamasdin Igor Zelenay |
Samarkand Challenger Samarcanda, Uzbekistan $75,000+H – Terra rossa – 32S/32Q/16D
| Adrián Menéndez Maceiras 6–4, 6–2 | Aldin Šetkić | Jason Jung Il'ja Ivaška | Jahor Herasimaŭ Aleksej Vatutin Nikola Milojević Tejmuraz Gabašvili |
Laurynas Grigelis Zdeněk Kolář 7–6(2), 6–3 | Prajnesh Gunneswaran Vishnu Vardhan |
22 maggio | Venice Challenge Save Cup Mestre, Italia €43,000+H – Terra rossa – 32S/32Q/16D
| João Domingues 7–6(4), 6–4 | Sebastian Ofner | Zdeněk Kolář Blake Mott | Julian Ocleppo Axel Michon Gianluigi Quinzi Matteo Viola |
Ken Skupski Neal Skupski 5–7, 6–4, [10–5] | Julian Knowle Igor Zelenay |
Shymkent Challenger Shymkent, Kazakistan $50,000+H – Terra rossa – 32S/32Q/16D
| Ričardas Berankis 6–3, 6–2 | Yannick Hanfmann | Oleksandr Nedovjesov Carlos Taberner | Clément Geens Evgenij Tjurnev Danilo Petrović Andrej Golubev |
Hans Podlipnik-Castillo Andrėj Vasileŭski 6–4, 6–2 | Clément Geens Juan Pablo Paz |
29 maggio | Internazionali Città di Vicenza Vicenza, Italia €43,000+H – Terra rossa – 32S/32Q/16D
| Márton Fucsovics 4–6, 7–6(7), 6–2 | Laslo Đere |
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