ITF M15 Alaminos-Larnaca 03/21 10:35 26 Iannis Miletich v Kai Lemstra 7-6,6-4
ITF M15 Alaminos-Larnaca 03/19 11:45 25 Kai Lemstra v Adrian Oetzbach 6-1,3-6,7-6
UTR Pro Dubai 03/17 05:00 - Kai Lemstra v Lukas Velik 6-3,6-3
UTR Pro Dubai 03/16 05:00 - Kai Lemstra v Viktor Markov 6-3,6-1
UTR Pro Dubai 03/15 05:00 - Kai Lemstra v Ed Pudney 6-1,6-2
UTR Pro Dubai 03/14 07:00 - Kai Lemstra v Karol Filar 2-6,1-6
UTR Pro Dubai 03/13 05:00 - Jannik Maute v Kai Lemstra 6-3,6-2
UTR Pro Dubai 03/12 08:00 - Daniel Salazar v Kai Lemstra 2-6,6-1,3-6
UTR Pro Dubai 03/09 07:00 - Kai Lemstra v Kristian Juhas 2-6,4-6
UTR Pro Dubai 03/08 06:30 - Mert Naci Turker v Kai Lemstra 6-1,2-6,1-6
UTR Pro Dubai 03/07 07:43 - Koray Kirci v Kai Lemstra 2-6,0-6
UTR Pro Dubai 03/05 05:00 - Lazar Vojinovic v Kai Lemstra 4-6,7-5,6-7
UTR Pro Dubai 03/04 06:30 - Kai Lemstra v Grigory Kuklin 6-2,6-4
ITF M25 Trento 02/20 10:30 54 Andrea Guerrieri v Kai Lemstra 6-1,7-5
ITF M15 Oberhaching 02/13 10:00 25 Tommaso Compagnucci v Kai Lemstra 6-3,6-4
ITF M25 Nussloch 01/24 15:15 25 Kai Lemstra v Kirill Kivattsev 1-6,6-7
ITF M15 Cadolzburg 01/17 09:55 25 Kai Lemstra v Vincent Marysko 6-7,4-6
German Championship 12/08 14:10 27 Kai Lemstra v Max Rehberg 3-6,4-6
German Championship 12/07 13:00 26 Kai Lemstra v Edison Ambarzumjan 6-3,6-1
German Championship 12/06 12:20 25 Kai Lemstra v Noel Larwig 6-2,6-4
ITF M15 Heraklion 11/24 08:00 26 Alastair Gray v Kai Lemstra 6-3,7-5
ITF M15 Heraklion 11/22 12:25 25 Alexandros Skorilas v Kai Lemstra 6-7,1-6
ITF M15 Heraklion 11/16 08:00 26 Kai Lemstra v Jakub Nicod 6-7,6-1,3-6
ITF M15 Heraklion 11/14 08:30 25 Kai Lemstra v Nikolay Nedelchev 3-6,6-4,6-1
ITF M15 Selva Gardena 11/01 12:05 26 Kai Lemstra v Hynek Barton 4-6,4-6
ITF M15 Selva Gardena 10/30 13:20 25 Massimo Giunta v Kai Lemstra 2-6,4-6
ITF M15 Bad Waltersdorf 10/05 07:30 26 Kai Lemstra v Vlad Andrei Dancu 1-6,1-6
ITF M15 Bad Waltersdorf 10/03 07:20 25 Jakub Filip v Kai Lemstra 0-6,0-6
ITF M15 Satu Mare 09/14 10:35 26 Stefan Palosi v Kai Lemstra 6-4,7-6
ITF M15 Satu Mare 09/13 09:25 25 Kai Lemstra v Simone Agostini 6-3,6-4