6‑Dec‑2021 | Forli 3 CH | Hard | R32 | 437 | 882 | Matteo Gigante [ITA] d. Gengel | 6-2 3-6 6-2 | | 0.74 | 6.0% | 6.0% | 65.5% | 60.0% | 51.7% | 5/9 | 1:34 |
22‑Nov‑2021 | Manama CH | Hard | R32 | 434 | 288 | Goncalo Oliveira [POR] d. (Q)Gengel | 6-4 6-4 | | 0.83 | 7.8% | 2.0% | 58.8% | 73.3% | 57.1% | 1/3 | 1:24 |
22‑Nov‑2021 | Manama CH | Hard | Q2 | 434 | 391 | (6)Gengel d. (1)Khumoyun Sultanov [UZB] | 4-6 7-6(2) 6-0 | | 1.25 | 4.1% | 5.2% | 59.8% | 72.4% | 51.3% | 5/8 | 2:09 |
22‑Nov‑2021 | Manama CH | Hard | Q1 | 434 | 767 | (6)Gengel d. (Alt)Arjun Kadhe [IND] | 4-6 6-4 6-3 | | 1.19 | 11.2% | 4.5% | 73.0% | 64.6% | 58.3% | 5/9 | 1:45 |
8‑Nov‑2021 | M15 Sharm El Sheikh | Hard | F | 474 | 2068 | (3)Gengel d. (Q)Loic Cloes [BEL] | 6-0 6-4 | | | | | | | | | |
8‑Nov‑2021 | M15 Sharm El Sheikh | Hard | SF | 474 | 993 | (3)Gengel d. (Q)Daniel Little [GBR] | 7-5 6-4 | | | | | | | | | |
8‑Nov‑2021 | M15 Sharm El Sheikh | Hard | QF | 474 | 1370 | (3)Gengel d. (Q)Sergei Pogosian [RUS] | 6-2 6-1 | | | | | | | | | |
8‑Nov‑2021 | M15 Sharm El Sheikh | Hard | R16 | 474 | 695 | (3)Gengel d. Kelsey Stevenson [CAN] | 6-3 6-3 | | | | | | | | | |
8‑Nov‑2021 | M15 Sharm El Sheikh | Hard | R32 | 474 | 1413 | (3)Gengel d. Erik Arutiunian [BLR] | 6-1 6-1 | | | | | | | | | |
1‑Nov‑2021 | M15 Sharm El Sheikh | Hard | F | 473 | 672 | (1)Gengel d. (3)Daniele Capecchi [ITA] | 6-7(6) 6-2 6-3 | | | | | | | | | |
1‑Nov‑2021 | M15 Sharm El Sheikh | Hard | SF | 473 | 711 | (1)Gengel d. (4)Illia Biloborodko [UKR] | 6-1 4-6 6-2 | | | | | | | | | |
1‑Nov‑2021 | M15 Sharm El Sheikh | Hard | QF | 473 | 705 | (1)Gengel d. (5)Emiliano Maggioli [ITA] | 6-3 6-7(5) 7-5 | | | | | | | | | |
1‑Nov‑2021 | M15 Sharm El Sheikh | Hard | R16 | 473 | 1402 | (1)Gengel d. (Q)Saba Purtseladze [GEO] | 6-2 6-0 | | | | | | | | | |
1‑Nov‑2021 | M15 Sharm El Sheikh | Hard | R32 | 473 | 782 | (1)Gengel d. Grigoriy Lomakin [KAZ] | 6-4 6-4 | | | | | | | | | |
18‑Oct‑2021 | M15 Sharm El Sheikh | Hard | QF | 488 | 648 | Hady Habib [LBN] d. (1)Gengel | 7-5 6-3 | | | | | | | | | |
18‑Oct‑2021 | M15 Sharm El Sheikh | Hard | R16 | 488 | | (1)Gengel d. (Q)Seydina Andre [SEN] | 6-3 6-2 | | | | | | | | | |
18‑Oct‑2021 | M15 Sharm El Sheikh | Hard | R32 | 488 | 1928 | (1)Gengel d. (LL)Ondrej Horak [CZE] | 6-0 6-2 | | | | | | | | | |
11‑Oct‑2021 | M15 Sharm El Sheikh | Hard | F | 442 | 725 | (1)Gengel d. (5)Peter Fajta [HUN] | 6-4 6-0 | | | | | | | | | |
11‑Oct‑2021 | M15 Sharm El Sheikh | Hard | SF | 442 | 781 | (1)Gengel d. (PR)Nam Hoang Ly [VIE] | 7-6(4) 5-7 7-6(4) | | | | | | | | | |
11‑Oct‑2021 | M15 Sharm El Sheikh | Hard | QF | 442 | 1019 | (1)Gengel d. Neil Oberleitner [AUT] | 6-2 6-1 | | | | | | | | | |
11‑Oct‑2021 | M15 Sharm El Sheikh | Hard | R16 | 442 | 1144 | (1)Gengel d. (WC)Michal Mikula [POL] | 6-4 6-3 | | | | | | | | | |
11‑Oct‑2021 | M15 Sharm El Sheikh | Hard | R32 | 442 | 1280 | (1)Gengel d. Romain Faucon [BEL] | 6-2 6-4 | | | | | | | | | |
4‑Oct‑2021 | M25 Prague | Hard | QF | 442 | 428 | (4)Khumoyun Sultanov [UZB] d. (5)Gengel | 3-6 6-3 6-4 | | | | | | | | | |
4‑Oct‑2021 | M25 Prague | Hard | R16 | 442 | 552 | (5)Gengel d. Jakub Paul [SUI] | 6-2 6-4 | | | | | | | | | |
4‑Oct‑2021 | M25 Prague | Hard | R32 | 442 | 753 | (5)Gengel d. Martin Krumich [CZE] | 5-7 7-5 6-4 | | | | | | | | | |
27‑Sep‑2021 | Orleans CH | Hard | Q1 | 443 | 231 | (2)Maxime Janvier [FRA] d. Gengel | 6-2 7-5 | | 0.47 | 5.9% | 4.4% | 55.9% | 60.5% | 50.0% | 6/10 | 1:11 |
20‑Sep‑2021 | Biel CH | Hard | Q1 | 445 | 353 | (4)Alexander Shevchenko [KAZ] d. Gengel | 6-3 6-3 | | 0.70 | 1.6% | 1.6% | 65.1% | 56.1% | 40.9% | 4/8 | 1:05 |
13‑Sep‑2021 | Rennes CH | Hard | Q1 | 442 | 628 | Kenny De Schepper [FRA] d. (6)Gengel | 6-4 6-1 | | 0.22 | 3.9% | 3.9% | 72.5% | 70.3% | 14.3% | 2/5 | |
6‑Sep‑2021 | Tulln CH | Clay | Q1 | 453 | 505 | (Alt)Mate Valkusz [HUN] d. (8)Gengel | 6-0 6-1 | | 0.26 | 4.2% | 8.3% | 52.1% | 40.0% | 30.4% | 7/13 | |
30‑Aug‑2021 | M25 Ricany | Clay | QF | 453 | 390 | Yshai Oliel [ISR] d. Gengel | 6-3 4-6 6-4 | | | | | | | | | |
30‑Aug‑2021 | M25 Ricany | Clay | R16 | 453 | 1314 | Gengel d. (WC)Filip Duda [CZE] | 6-3 6-3 | | | | | | | | | |
30‑Aug‑2021 | M25 Ricany | Clay | R32 | 453 | 1237 | Gengel d. (WC)Daniel Siniakov [CZE] | 7-5 6-3 | | | | | | | | | |
23‑Aug‑2021 | Prague 3 CH | Clay | Q1 | 437 | 411 | (8)Alex Rybakov [USA] d. Gengel | 7-5 6-1 | | 0.76 | 1.8% | 3.6% | 50.0% | 64.3% | 53.6% | 0/3 | 1:25 |
16‑Aug‑2021 | M25 Prostejov | Clay | R16 | 435 | 411 | (8)Alex Rybakov [USA] d. Gengel | 6-3 6-3 | | | | | | | | | |
16‑Aug‑2021 | M25 Prostejov | Clay | R32 | 435 | 2086 | Gengel d. (Q)Christopher Patzanovsky [GER] | 6-2 6-0 | | | | | | | | | |
9‑Aug‑2021 | Prague 2 CH | Clay | Q1 | 439 | 393 | (8)Emilio Nava [USA] d. Gengel | 6-4 6-3 | | 0.86 | 0.0% | 1.6% | 52.4% | 54.5% | 50.0% | 7/11 | 1:17 |
2‑Aug‑2021 | M25 Grodzisk Mazowiecki | Clay | R32 | 438 | 1460 | (Q)Philip Bachmaier [AUT] d. (5)Gengel | 6-3 6-4 | | | | | | | | | |
26‑Jul‑2021 | M15 Castelo Branco | Hard | R16 | 437 | 1517 | (WC)Daniel Batista [POR] d. (1)Gengel | 6-4 3-6 6-3 | | | | | | | | | |
26‑Jul‑2021 | M15 Castelo Branco | Hard | R32 | 437 | 1090 | (1)Gengel d. Ray Ho [TPE] | 6-2 2-6 6-3 | | | | | | | | | |
19‑Jul‑2021 | M25 Idanha-a-Nova | Hard | R16 | 432 | | (Q)Clement Chidekh [FRA] d. (2)Gengel | 6-4 7-6(3) | | | | | | | | | |
19‑Jul‑2021 | M25 Idanha-a-Nova | Hard | R32 | 432 | 541 | (2)Gengel d. Joao Lucas Reis Da Silva [BRA] | 7-5 6-0 | | | | | | | | | |
14‑Jun‑2021 | Aix-En-Provence CH | Clay | Q1 | 435 | 421 | (8)Eduard Esteve Lobato [ESP] d. Gengel | 6-0 6-1 | | 0.55 | 4.3% | 14.9% | 46.8% | 63.6% | 20.0% | 4/9 | 1:01 |
7‑Jun‑2021 | M15 Gaiba | Grass | R32 | 436 | 578 | Mats Rosenkranz [GER] d. (4)Gengel | 4-6 7-5 6-1 | | | | | | | | | |
24‑May‑2021 | M25 Most | Clay | R32 | 435 | | (Q)Antonin Bolardt [CZE] d. Gengel | 7-6(7) 6-0 | | | | | | | | | |
17‑May‑2021 | M15 Tbilisi | Hard | QF | 434 | 564 | (6)Alexander Shevchenko [KAZ] d. (2)Gengel | 6-7(4) 6-4 6-4 | | | | | | | | | |
17‑May‑2021 | M15 Tbilisi | Hard | R16 | 434 | | (2)Gengel d. Aidan Mayo [USA] | 6-3 6-2 | | | | | | | | | |
17‑May‑2021 | M15 Tbilisi | Hard | R32 | 434 | 650 | (2)Gengel d. Marat Deviatiarov [UKR] | 6-1 6-4 | | | | | | | | | |
10‑May‑2021 | M15 Jerusalem | Hard | QF | 430 | 546 | (5)Zane Khan [USA] d. (2)Gengel | 7-5 7-6(3) | | | | | | | | | |
10‑May‑2021 | M15 Jerusalem | Hard | R16 | 430 | 1169 | (2)Gengel d. (Q)Alexandros Skorilas [GRE] | 6-2 6-1 | | | | | | | | | |
10‑May‑2021 | M15 Jerusalem | Hard | R32 | 430 | | (2)Gengel d. (Q)Lorenzo Lorusso [ITA] | 7-6(5) 6-4 | | | | | | | | | |
26‑Apr‑2021 | Salinas 2 CH | Hard | Q2 | 429 | 393 | (2)Hernan Casanova [ARG] d. (5)Gengel | 3-6 6-4 7-5 | | 0.99 | 3.2% | 2.1% | 72.3% | 66.2% | 42.3% | 8/12 | 2:08 |
26‑Apr‑2021 | Salinas 2 CH | Hard | Q1 | 429 | 503 | (5)Gengel d. Gage Brymer [USA] | 6-4 5-7 6-2 | | 1.05 | 2.9% | 1.0% | 86.4% | 52.8% | 71.4% | 9/14 | 2:20 |
19‑Apr‑2021 | Salinas 1 CH | Hard | R32 | 435 | 576 | (Q)Tak Khunn Wang [FRA] d. (Q)Gengel | 6-2 6-3 | | 0.73 | 4.3% | 2.1% | 72.3% | 47.1% | 30.8% | 3/9 | 1:25 |
19‑Apr‑2021 | Salinas 1 CH | Hard | Q2 | 435 | 484 | (3)Gengel d. Mathieu Perchicot [FRA] | 6-3 3-6 7-5 | | 1.13 | 4.3% | 1.1% | 79.3% | 60.3% | 68.4% | 4/8 | 2:04 |
19‑Apr‑2021 | Salinas 1 CH | Hard | Q1 | 435 | | (3)Gengel d. (WC)Omar Suarez [ECU] | 6-1 6-1 | | 2.81 | 5.3% | 0.0% | 84.2% | 75.0% | 100.0% | 2/2 | 0:43 |
29‑Mar‑2021 | M15 Sharm El Sheikh | Hard | R32 | 444 | 506 | Aldin Setkic [BIH] d. (5)Gengel | 6-4 4-6 6-3 | | | | | | | | | |
22‑Mar‑2021 | M15 Sharm El Sheikh | Hard | SF | 444 | 483 | (8)Makoto Ochi [JPN] d. (6)Gengel | 2-6 6-2 6-3 | | | | | | | | | |
22‑Mar‑2021 | M15 Sharm El Sheikh | Hard | QF | 444 | 399 | (6)Gengel d. (3)Petros Chrysochos [CYP] | 6-2 6-3 | | | | | | | | | |
22‑Mar‑2021 | M15 Sharm El Sheikh | Hard | R16 | 444 | 621 | (6)Gengel d. Takuto Niki [JPN] | 6-1 6-0 | | | | | | | | | |
22‑Mar‑2021 | M15 Sharm El Sheikh | Hard | R32 | 444 | 983 | (6)Gengel d. (Q)Mattia Bellucci [ITA] | 6-1 6-4 | | | | | | | | | |
15‑Mar‑2021 | M15 Sharm El Sheikh | Hard | QF | 439 | 479 | Makoto Ochi [JPN] d. (7)Gengel | 6-3 3-6 6-3 | | | | | | | | | |
15‑Mar‑2021 | M15 Sharm El Sheikh | Hard | R16 | 439 | 1451 | (7)Gengel d. (Q)Ben Jones [GBR] | 6-7(4) 6-3 6-3 | | | | | | | | | |
15‑Mar‑2021 | M15 Sharm El Sheikh | Hard | R32 | 439 | | (7)Gengel d. (WC)Tomas Papik [CZE] | 7-5 6-1 | | | | | | | | | |
8‑Mar‑2021 | M15 Sharm El Sheikh | Hard | QF | 438 | 447 | Yu Hsiou Hsu [TPE] d. (8)Gengel | 6-3 6-3 | | | | | | | | | |
8‑Mar‑2021 | M15 Sharm El Sheikh | Hard | R16 | 438 | 487 | (8)Gengel d. Jacopo Berrettini [ITA] | 6-4 6-3 | | | | | | | | | |
8‑Mar‑2021 | M15 Sharm El Sheikh | Hard | R32 | 438 | | (8)Gengel d. (WC)Matas Vasiliauskas [LTU] | 6-1 6-1 | | | | | | | | | |
15‑Feb‑2021 | M15 Sharm El Sheikh | Hard | QF | 473 | 355 | (3)Jiri Lehecka [CZE] d. Gengel | 6-3 1-6 6-4 | | | | | | | | | |
15‑Feb‑2021 | M15 Sharm El Sheikh | Hard | R16 | 473 | 429 | Gengel d. (6)Lucas Catarina [MON] | 7-6(3) 4-6 7-6(2) | | | | | | | | | |
15‑Feb‑2021 | M15 Sharm El Sheikh | Hard | R32 | 473 | 520 | Gengel d. Nick Hardt [DOM] | 6-4 6-2 | | | | | | | | | |
8‑Feb‑2021 | M15 Sharm El Sheikh | Hard | F | 473 | 362 | (Q)Gengel d. (3)Jan Satral [CZE] | 6-2 6-2 | | | | | | | | | |
8‑Feb‑2021 | M15 Sharm El Sheikh | Hard | SF | 473 | 355 | (Q)Gengel d. (2)Jiri Lehecka [CZE] | 5-7 6-4 6-3 | | | | | | | | | |
8‑Feb‑2021 | M15 Sharm El Sheikh | Hard | QF | 473 | 457 | (Q)Gengel d. Marko Tepavac [SRB] | 6-4 6-4 | | | | | | | | | |
8‑Feb‑2021 | M15 Sharm El Sheikh | Hard | R16 | 473 | 502 | (Q)Gengel d. (Q)Marko Miladinovic [SRB] | W/O | | | | | | | | | |
8‑Feb‑2021 | M15 Sharm El Sheikh | Hard | R32 | 473 | 404 | (Q)Gengel d. (6)Tobias Simon [GER] | 7-5 6-4 | | | | | | | | | |
1‑Feb‑2021 | M15 Sharm El Sheikh | Hard | SF | 472 | 497 | (Q)Yu Hsiou Hsu [TPE] d. Gengel | 6-3 6-2 | | | | | | | | | |
1‑Feb‑2021 | M15 Sharm El Sheikh | Hard | QF | 472 | 597 | Gengel d. (SE)Nicolas Moreno De Alboran [USA] | 6-7(3) 6-4 6-2 | | | | | | | | | |
1‑Feb‑2021 | M15 Sharm El Sheikh | Hard | R16 | 472 | 325 | Gengel d. (1)Shintaro Imai [JPN] | 6-2 6-3 | | | | | | | | | |
1‑Feb‑2021 | M15 Sharm El Sheikh | Hard | R32 | 472 | 537 | Gengel d. (Q)Fabian Marozsan [HUN] | 6-4 3-6 7-5 | | | | | | | | | |