Plovdiv • ATP CH 50 R1 Brouwer G PR 62 60 22 June Poznan • ATP CH 100 R1 Heide G 8 62 62 16 June Bratislava • ATP CH 100 Q1 Martin A 63 36 76⁸ 8 June Prostejov • ATP CH 100 Q2 Durasovic V 12 60 64 1 June Q1 Paulson A Alt 61 46 64 31 May Istanbul • ATP CH 75 QF Barton H 7 63 64 21 May R2 Hassan B 63 57 75 21 May R1 Sharipov M 63 64 18 May Zagreb • ATP CH 75 Q1 Kokkinakis T WC 76³ 63 10 May Ostrava • ATP CH 75 R1 Cecchinato M 7 63 62 27 April Santa Margherita Di Pula • M 25 R1 Forti F 76⁴ 64 14 April Bucharest • ATP 250 Q1 Basilashvili N 1 64 75 30 March Split • ATP CH 50 R1 Ferreira Silva F 5 64 62 24 March Zadar • ATP CH 75 R2 Gea A 3 63 76⁴ 19 March R1 Pieri S Q 63 60 17 March Pune • ATP CH 75 R1 Gray A 63 36 63 23 February New Delhi • ATP CH 75 R2 Geerts M 76⁸ 64 19 February R1 Singh K 46 76⁵ 63 16 February Phan Thiet • ATP CH 50 SF ZhouYi 6 76³ ab 31 January QF Bax F 62 64 30 January R2 Jasika O 64 16 61 29 January R1 Handel T WC 75 61 27 January Phan Thiet • ATP CH 50 SF Simakin I 67⁶ 61 63 24 January QF Blanch D 57 76³ 63 23 January R2 Cina F 62 64 21 January R1 Uchida K 36 63 63 19 January Nonthaburi • ATP CH 75 R2 Sharipov M 64 63 14 January R1 Shimizu Y 62 26 63 13 January