| WTT Contender Antalya MD | 10/20 07:50 | 3 | Gunduz I / Yigenler A v Kristian Karlsson/Kallberg | L | 0-3 | |
| WTT Feeder Antalya MD | 03/29 12:20 | 4 | Gunduz I / Yigenler A v Choong/Wong | L | 1-3 | |
| WTT Feeder Antalya MD Quals | 03/28 16:05 | - | Giardi F / Mongiusti M v Gunduz I / Yigenler A | W | 0-3 | |
| European Championships MD | 08/16 16:40 | 5 | Andras/Majoros v Gunduz I / Yigenler A | L | 3-0 | |
| WTT Contender Tunis MD Quals | 08/02 15:00 | - | Rolland/Rembert v Gunduz I / Yigenler A | L | 3-2 | |
| WTT Contender Lima MD | 06/16 16:50 | 4 | Gunduz I / Yigenler A v Lorenzo/Bentancor | L | 1-3 | |
| WTT Contender Lima MD Quals | 06/15 20:30 | - | Madrid/Rolland v Gunduz I / Yigenler A | W | 1-3 | |
| WTT Contender Muscat MD | 03/01 07:00 | - | Cao W / Xu Y v Gunduz I / Yigenler A | L | 3-2 | |
| European Championships MD | 06/24 10:15 | 5 | Polansky T / Sirucek P v Gunduz I / Yigenler A | L | 3-1 | |
| European Championship MD | 06/23 07:35 | - | Gunduz I / Yigenler A v Rech Daldosso/Hribar | W | 3-1 | |
| Hungarian Open 2020, MD, Qualification | 02/19 12:20 | - | Achanta/Gnanasekaran v Gunduz I / Yigenler A | L | 3-1 | |
| Belarus Open MD | 10/31 14:30 | - | Sidorenko V / Skachkov K v Gunduz I / Yigenler A | L | 3-0 | |
| Belarus Open MD | 10/31 13:10 | - | Kenzhigulov A / Zhamal B v Gunduz I / Yigenler A | W | 2-3 | |
| Bulgaria Open 2019, MD | 08/13 16:40 | - | Gunduz I / Yigenler A v Cvetko T / Hribar P | L | 2-3 | |
| Balkan Champs MD | 08/04 10:30 | - | Gunduz I / Yigenler A v Gunduz Z / Sahin Z B | W | 3-1 | |
| Balkan Champs MD | 08/04 07:30 | - | Gunduz I / Yigenler A v Cekic I / Kostadinovic S | W | 3-1 | |
| Balkan Champs MD | 08/03 15:00 | - | Gunduz I / Yigenler A v Mladin/Zelko | W | 2-1 | |
| Paraguay Open U21 Women | 07/19 15:02 | - | Gunduz I / Yigenler A v Bennet/Tianyuan | L | 2-3 | |
| Qatar Open XD | 11/16 09:40 | - | Alkhadrawi A / Bu Shulaybi A v Gunduz I / Yigenler A | L | 3-1 | |
| République tchèque - Extraleague | 09/20 10:00 | 6 | Gunduz I / Yigenler A v Shibaev A / Skachkov K | L | 1-4 | |
| Qatar Open XD | 09/19 15:30 | 1 | Gunduz I / Yigenler A v Kozul D / Zibrat J | W | 3-0 | |
| République tchèque - Extraleague | 08/16 09:00 | 4 | Ecseki N / Szudi A v Gunduz I / Yigenler A | L | 3-0 | |
| Qatar Open XD | 03/11 11:20 | 1 | Badowski M / Zatowka P v Gunduz I / Yigenler A | W | 1-3 | |
| Qatar Open XD | 03/11 07:40 | 1 | Gunduz I / Yigenler A v Abusev / Chernov | W | 3-1 | |
| Qatar Open XD | 01/17 20:15 | 1 | Gunduz I / Yigenler A v Konecny T / Polansky T | L | 0-3 | |
| Qatar Open XD | 11/01 17:49 | - | Gunduz I / Yigenler A v Tran/Brodd | W | 3-0 | |
| Qatar Open XD | 08/23 19:30 | 1 | Gunduz I / Yigenler A v Gardos/Habesohn | L | 2-3 | |
| Qatar Open XD | 08/17 09:00 | 1 | Anthony A / Shetty S v Gunduz I / Yigenler A | L | 3-2 | |
| République tchèque - Extraleague | 05/30 18:15 | 6 | Gunduz I / Yigenler A v Jeoung Y / Lee S | L | 2-4 | |
| Qatar Open 2019, MS | 03/18 07:30 | - | Kizukuri Y / Takami M v Gunduz I / Yigenler A | L | 3-2 |