| Challenger Barletta | 04/01 13:15 | 25 | [254] Enrico Dalla Valle v Steven Diez [327] | 2-6,6-0,6-3 | |
| Challenger Girona | 03/25 11:15 | 19 | [334] Felix Gill v Steven Diez [329] | Retired | |
| Challenger Girona | 03/24 10:20 | 14 | Carlos Taberner v Steven Diez | Cancelled | |
| Challenger Amburgo | 03/11 13:55 | 25 | [271] Henri Squire v Steven Diez [308] | 6-2,6-4 | |
| ITF M15 Torello | 03/07 09:25 | 26 | Federico Iannaccone v Steven Diez | 7-6,6-3 | |
| ITF M15 Torello | 03/06 11:40 | 25 | Kane Bonsach Ganley v Steven Diez | 3-6,3-6 | |
| Challenger Tenerife | 02/20 15:45 | 25 | [316] Steven Diez v Franco Agamenone [205] | 5-7,6-3,2-6 | |
| Challenger Tenerife | 02/19 12:00 | 19 | [295] Gastao Elias v Steven Diez [316] | Retired | |
| Challenger Tenerife | 02/18 14:05 | 14 | [472] Imanol L Morillo v Steven Diez [316] | 4-6,3-6 | |
| Challenger Glasgow | 02/15 12:30 | 26 | Nicola Kuhn v Steven Diez | 6-3,6-1 | |
| Challenger Glasgow | 02/13 14:30 | 25 | [419] Yshai Oliel v Steven Diez [316] | 4-6,7-5,6-7 | |
| Challenger Nottingham | 02/04 14:25 | 14 | [318] Steven Diez v Ben Jones [228] | 4-6,4-6 | |
| Challenger Koblenz | 01/28 09:00 | 14 | [487] Kenny de Schepper v Steven Diez [315] | 6-3,6-2 | |
| Challenger Ottignies | 01/22 15:00 | 14 | [315] Steven Diez v Michael Geerts [291] | 3-6,3-6 | |
| Challenger Nonthaburi | 01/09 05:50 | 25 | [396] Hiroki Moriya v Steven Diez [314] | 6-3,6-0 | |
| United Cup | 01/03 06:30 | - | [6] Stefanos Tsitsipas v Steven Diez [314] | 6-2,6-3 | |
| United Cup | 12/31 01:05 | - | [314] Steven Diez v Nicolas Jarry [19] | 5-7,4-6 | |
| Challenger Maspalomas | 11/28 15:00 | 25 | [265] Steven Diez v Raul Brancaccio [190] | 4-6,2-6 | |
| Challenger Valencia | 11/19 11:00 | 14 | [394] Carlos Lopez Montagud v Steven Diez [265] | 6-0,6-2 | |
| Challenger Drummondville | 11/14 23:30 | 25 | [265] Steven Diez v Liam Draxl [297] | 4-6,7-6,1-6 | |
| Challenger Calgary | 11/09 18:45 | 26 | [270] Steven Diez v Aziz Dougaz [242] | 3-6,2-6 | |
| Challenger Calgary | 11/07 18:50 | 25 | [317] Juan Carlos Aguilar v Steven Diez [270] | 3-6,6-1,3-6 | |
| Challenger Shenzhen | 10/19 04:00 | 26 | [436] Yan Bai v Steven Diez [268] | 3-6,6-1,6-4 | |
| Challenger Shenzhen | 10/16 05:10 | 26 | [471] Nam Hoang Ly v Steven Diez [268] | 4-6,1-6 | |
| Challenger Shenzhen | 10/11 04:05 | 25 | [85] Nuno Borges v Steven Diez [269] | 7-5,6-2 | |
| ATP Shanghai | 10/03 08:15 | 15 | [147] Terence Atmane v Steven Diez [268] | 7-6,6-2 | |
| ATP Shanghai | 10/02 10:30 | 14 | [378] Nam Hoang Ly v Steven Diez [268] | 6-2,4-6,3-6 | |
| Challenger Sibiu | 09/18 13:00 | 25 | [259] Steven Diez v Riccardo Bonadio [220] | 2-6,5-7 | |
| Challenger Szczecin | 09/11 09:30 | 19 | [250] Steven Diez v Andrew Paulson [350] | 3-6,1-6 | |
| Challenger Szczecin | 09/10 09:45 | 14 | [252] Steven Diez v Szymon Kielan [301] | 6-1,7-5 |
Wikipedia - Steven Diez
Steven Diez (Toronto, 17 marzo 1991) è un tennista canadese.
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