11‑Nov‑2019 | Pune CH | Hard | R16 | 270 | 248 | (7)Roberto Ortega Olmedo [ESP] d. (11)Sekiguchi | 6-2 6-4 | | 0.71 | 6.2% | 4.6% | 60.0% | 64.1% | 34.6% | 4/8 | 1:19 |
11‑Nov‑2019 | Pune CH | Hard | R32 | 270 | 1554 | (11)Sekiguchi d. Roman Blokhin [RUS] | 6-3 6-0 | | 3.06 | 11.4% | 2.9% | 65.7% | 82.6% | 83.3% | 0/0 | 0:43 |
4‑Nov‑2019 | Kobe CH | Hard | R64 | 268 | 521 | Ben Patael [ISR] d. Sekiguchi | 6-3 6-2 | | 0.70 | 6.4% | 10.6% | 53.2% | 60.0% | 36.4% | 3/7 | 1:06 |
28‑Oct‑2019 | Playford CH | Hard | R16 | 272 | 137 | (4)Marc Polmans [AUS] d. (14)Sekiguchi | 6-3 6-4 | | 0.73 | 5.8% | 3.8% | 59.6% | 67.7% | 47.6% | 3/6 | 1:20 |
28‑Oct‑2019 | Playford CH | Hard | R32 | 272 | 606 | (14)Sekiguchi d. Matthew Christopher Romios [AUS] | 6-3 6-1 | | 1.85 | 10.9% | 4.3% | 52.2% | 79.2% | 68.2% | 2/2 | 1:01 |
21‑Oct‑2019 | Traralgon CH | Hard | R16 | 278 | 87 | (1)Yasutaka Uchiyama [JPN] d. (14)Sekiguchi | 6-4 3-6 7-5 | | 0.84 | 0.9% | 3.8% | 52.8% | 69.6% | 50.0% | 8/12 | 2:07 |
21‑Oct‑2019 | Traralgon CH | Hard | R32 | 278 | 374 | (14)Sekiguchi d. Dayne Kelly [AUS] | 6-4 2-6 7-6(7) | | 0.93 | 3.0% | 1.0% | 54.0% | 74.1% | 52.2% | 5/8 | 2:10 |
14‑Oct‑2019 | Ningbo CH | Hard | R64 | 283 | 275 | Ji Sung Nam [KOR] d. Sekiguchi | 6-1 6-1 | | 0.33 | 2.6% | 7.7% | 56.4% | 40.9% | 41.2% | 2/7 | 0:42 |
7‑Oct‑2019 | M25 Tay Ninh | Hard | QF | 283 | 446 | Daniel Nguyen [USA] d. (2)Sekiguchi | 5-1 RET | | | | | | | | | |
7‑Oct‑2019 | M25 Tay Ninh | Hard | R16 | 283 | 650 | (2)Sekiguchi d. Kento Takeuchi [JPN] | 5-5 RET | | | | | | | | | |
7‑Oct‑2019 | M25 Tay Ninh | Hard | R32 | 283 | 530 | (2)Sekiguchi d. Sidharth Rawat [IND] | 6-0 6-1 | | | | | | | | | |
16‑Sep‑2019 | Kaohsiung CH | Hard | R32 | 286 | 82 | (2)Prajnesh Gunneswaran [IND] d. Sekiguchi | 6-3 6-2 | | 0.66 | 9.5% | 4.8% | 54.8% | 69.6% | 36.8% | 3/7 | 0:52 |
16‑Sep‑2019 | Kaohsiung CH | Hard | R64 | 286 | 861 | Sekiguchi d. (WC)Ray Ho [TPE] | 7-6(6) 6-3 | | 0.94 | 1.3% | 2.5% | 58.8% | 74.5% | 63.6% | 2/2 | 1:32 |
9‑Sep‑2019 | Shanghai CH | Hard | R16 | 290 | 165 | (4)Yasutaka Uchiyama [JPN] d. Sekiguchi | 6-4 6-3 | | 0.64 | 0.0% | 1.5% | 55.4% | 66.7% | 37.9% | 8/12 | 1:20 |
9‑Sep‑2019 | Shanghai CH | Hard | R32 | 290 | 258 | Sekiguchi d. (13)Saketh Myneni [IND] | 4-6 6-3 7-6(4) | | 1.00 | 3.7% | 1.9% | 64.8% | 72.9% | 55.3% | 4/6 | 2:08 |
9‑Sep‑2019 | Shanghai CH | Hard | R64 | 290 | 369 | Sekiguchi d. Jacob Grills [AUS] | 3-6 6-1 6-1 | | 1.86 | 12.5% | 3.6% | 57.1% | 84.4% | 62.5% | 2/3 | 1:40 |
2‑Sep‑2019 | Jinan CH | Hard | R32 | 304 | 243 | (16)Akira Santillan [AUS] d. Sekiguchi | 6-1 6-2 | | 0.27 | 2.4% | 4.8% | 64.3% | 66.7% | 20.0% | 2/6 | 0:44 |
2‑Sep‑2019 | Jinan CH | Hard | R64 | 304 | 285 | Sekiguchi d. Sasi Kumar Mukund [IND] | 6-3 6-3 | | 1.35 | 4.8% | 1.6% | 66.1% | 65.9% | 61.9% | 1/2 | 1:22 |
5‑Aug‑2019 | Yokkaichi CH | Hard | R16 | 308 | 286 | (10)Tung Lin Wu [TPE] d. Sekiguchi | 6-4 0-0 RET | | 0.73 | 10.8% | 0.0% | 70.3% | 53.8% | 45.5% | 6/8 | 0:38 |
5‑Aug‑2019 | Yokkaichi CH | Hard | R32 | 308 | 310 | Sekiguchi d. (6)Ze Zhang [CHN] | 3-6 7-6(5) 7-5 | | 1.01 | 11.2% | 3.7% | 60.7% | 73.8% | 52.4% | 8/11 | 2:28 |
5‑Aug‑2019 | Yokkaichi CH | Hard | R64 | 308 | 1599 | Sekiguchi d. Kosuke Ogura [JPN] | 6-1 6-3 | | 1.52 | 5.6% | 0.0% | 64.8% | 77.1% | 47.4% | 1/1 | 1:18 |
29‑Jul‑2019 | Chengdu CH | Hard | QF | 458 | 154 | (3)Tatsuma Ito [JPN] d. Sekiguchi | 6-2 6-1 | | 0.50 | 0.0% | 14.0% | 48.8% | 52.4% | 31.8% | 3/8 | 1:00 |
29‑Jul‑2019 | Chengdu CH | Hard | R16 | 458 | 251 | Sekiguchi d. (7)Goncalo Oliveira [POR] | 6-4 3-6 6-4 | | 1.00 | 9.1% | 1.3% | 54.5% | 85.7% | 45.7% | 1/3 | 2:05 |
29‑Jul‑2019 | Chengdu CH | Hard | R32 | 458 | 300 | Sekiguchi d. (12)Tsung Hua Yang [TPE] | 6-4 6-4 | | 1.29 | 4.8% | 1.6% | 46.8% | 72.4% | 60.6% | 3/4 | 1:23 |
29‑Jul‑2019 | Chengdu CH | Hard | R64 | 458 | | Sekiguchi d. (WC)Wei Qiang Zheng [CHN] | 7-5 6-1 | | 1.84 | 10.3% | 3.4% | 63.8% | 83.8% | 57.1% | 3/4 | 1:14 |
15‑Jul‑2019 | Nur-Sultan CH | Hard | R16 | 516 | 137 | (4)Egor Gerasimov [BLR] d. (ITF)Sekiguchi | 6-2 6-0 | | 0.52 | 1.7% | 5.0% | 63.3% | 52.6% | 31.8% | 5/10 | 1:01 |
15‑Jul‑2019 | Nur-Sultan CH | Hard | R32 | 516 | 299 | (ITF)Sekiguchi d. (16)Zhizhen Zhang [CHN] | 7-5 6-4 | | 1.15 | 11.6% | 4.3% | 53.6% | 70.3% | 50.0% | 5/8 | 1:21 |
15‑Jul‑2019 | Nur-Sultan CH | Hard | R64 | 516 | | (ITF)Sekiguchi d. (WC)Dostanbek Tashbulatov [KAZ] | 6-3 6-1 | | 1.99 | 9.3% | 4.7% | 58.1% | 84.0% | 61.1% | 0/0 | 1:03 |
17‑Jun‑2019 | Fergana CH | Hard | R32 | 412 | 280 | (6)Tomas Barrios Vera [CHI] d. Sekiguchi | W/O | | | | | | | | | |
17‑Jun‑2019 | Fergana CH | Hard | R64 | 412 | 374 | Sekiguchi d. Makoto Ochi [JPN] | 6-4 6-4 | | 1.34 | 4.6% | 1.5% | 72.3% | 59.6% | 83.3% | 3/5 | 1:34 |
3‑Jun‑2019 | M25 Hong Kong | Hard | F | 423 | 515 | Shintaro Imai [JPN] d. Sekiguchi | 6-2 6-1 | | | | | | | | | |
3‑Jun‑2019 | M25 Hong Kong | Hard | SF | 423 | 617 | Sekiguchi d. Yuki Mochizuki [JPN] | 6-3 7-6(3) | | | | | | | | | |
3‑Jun‑2019 | M25 Hong Kong | Hard | QF | 423 | 373 | Sekiguchi d. (2)Yusuke Takahashi [JPN] | 6-3 6-3 | | | | | | | | | |
3‑Jun‑2019 | M25 Hong Kong | Hard | R16 | 423 | 675 | Sekiguchi d. (IR )Xin Gao [CHN] | 6-3 6-1 | | | | | | | | | |
3‑Jun‑2019 | M25 Hong Kong | Hard | R32 | 423 | | Sekiguchi d. (WC)Wai Yu Kai [HKG] | 6-2 6-1 | | | | | | | | | |
27‑May‑2019 | M25 Nonthaburi | Hard | QF | 423 | 566 | Rio Noguchi [JPN] d. (2)Sekiguchi | 7-5 5-7 6-1 | | | | | | | | | |
27‑May‑2019 | M25 Nonthaburi | Hard | R16 | 423 | | (2)Sekiguchi d. Chayanon Kaewsuto [THA] | 6-2 5-7 6-4 | | | | | | | | | |
27‑May‑2019 | M25 Nonthaburi | Hard | R32 | 423 | | (2)Sekiguchi d. Adil Kalyanpur [IND] | 7-6(4) 6-4 | | | | | | | | | |
20‑May‑2019 | M25 Nonthaburi | Hard | F | 422 | 352 | Sekiguchi d. Ji Sung Nam [KOR] | 6-1 6-4 | | | | | | | | | |
20‑May‑2019 | M25 Nonthaburi | Hard | SF | 422 | 401 | Sekiguchi d. (4)Harry Bourchier [AUS] | 6-4 6-4 | | | | | | | | | |
20‑May‑2019 | M25 Nonthaburi | Hard | QF | 422 | | Sekiguchi d. Kelsey Stevenson [CAN] | 7-6(5) 6-2 | | | | | | | | | |
20‑May‑2019 | M25 Nonthaburi | Hard | R16 | 422 | | Sekiguchi d. (Q)Jayden Court [AUS] | 6-4 6-1 | | | | | | | | | |
20‑May‑2019 | M25 Nonthaburi | Hard | R32 | 422 | | Sekiguchi d. (WC)Sonchat Ratiwatana [THA] | 7-5 6-0 | | | | | | | | | |
6‑May‑2019 | M25 Wuhan | Hard | F | 411 | 385 | Yan Bai [CHN] d. (4)Sekiguchi | 6-2 6-4 | | | | | | | | | |
6‑May‑2019 | M25 Wuhan | Hard | SF | 411 | 490 | (4)Sekiguchi d. Wishaya Trongcharoenchaikul [THA] | 7-6(8) 7-5 | | | | | | | | | |
6‑May‑2019 | M25 Wuhan | Hard | QF | 411 | | (4)Sekiguchi d. (IR )Tyler Lu [USA] | 6-1 6-0 | | | | | | | | | |
6‑May‑2019 | M25 Wuhan | Hard | R16 | 411 | 664 | (4)Sekiguchi d. Hong Kit Jack Wong [HKG] | 6-2 6-3 | | | | | | | | | |
6‑May‑2019 | M25 Wuhan | Hard | R32 | 411 | 656 | (4)Sekiguchi d. Sora Fukuda [JPN] | 2-6 6-3 4-0 RET | | | | | | | | | |
29‑Apr‑2019 | M15 Wuhan | Hard | F | 411 | | Sekiguchi d. Sho Shimabukuro [JPN] | 6-3 6-0 | | | | | | | | | |
29‑Apr‑2019 | M15 Wuhan | Hard | SF | 411 | 586 | Sekiguchi d. Kuan Yi Lee [TPE] | 6-3 6-3 | | | | | | | | | |
29‑Apr‑2019 | M15 Wuhan | Hard | QF | 411 | 657 | Sekiguchi d. (7)Ti Chen [TPE] | W/O | | | | | | | | | |
29‑Apr‑2019 | M15 Wuhan | Hard | R16 | 411 | | Sekiguchi d. Alexander Crnokrak [AUS] | 7-5 6-2 | | | | | | | | | |
29‑Apr‑2019 | M15 Wuhan | Hard | R32 | 411 | | Sekiguchi d. (Q)Chenhe Li [CHN] | 6-4 6-3 | | | | | | | | | |
8‑Apr‑2019 | M25 Matsuyama | Hard | F | 398 | | (2)Sekiguchi d. Takuto Niki [JPN] | 6-4 6-4 | | | | | | | | | |
8‑Apr‑2019 | M25 Matsuyama | Hard | SF | 398 | 534 | (2)Sekiguchi d. Seong Chan Hong [KOR] | 6-2 6-3 | | | | | | | | | |
8‑Apr‑2019 | M25 Matsuyama | Hard | QF | 398 | | (2)Sekiguchi d. Naoki Tajima [JPN] | 6-4 6-4 | | | | | | | | | |
8‑Apr‑2019 | M25 Matsuyama | Hard | R16 | 398 | | (2)Sekiguchi d. (Q)Issei Okamura [JPN] | 6-1 6-0 | | | | | | | | | |
8‑Apr‑2019 | M25 Matsuyama | Hard | R32 | 398 | | (2)Sekiguchi d. Ryota Tanuma [JPN] | 6-4 6-4 | | | | | | | | | |
1‑Apr‑2019 | M15 Kashiwa | Hard | R32 | 398 | | Takuto Niki [JPN] d. (5)Sekiguchi | 2-6 6-3 7-6(5) | | | | | | | | | |
11‑Mar‑2019 | M15 Nishi Tokyo | Hard | F | 399 | 535 | Seong Chan Hong [KOR] d. Sekiguchi | 7-6(4) 6-4 | | | | | | | | | |
11‑Mar‑2019 | M15 Nishi Tokyo | Hard | SF | 399 | | Sekiguchi d. Takuto Niki [JPN] | 6-4 6-7(6) 6-3 | | | | | | | | | |
11‑Mar‑2019 | M15 Nishi Tokyo | Hard | QF | 399 | 666 | Sekiguchi d. Shintaro Imai [JPN] | 6-3 6-0 | | | | | | | | | |
11‑Mar‑2019 | M15 Nishi Tokyo | Hard | R16 | 399 | 615 | Sekiguchi d. Yuki Mochizuki [JPN] | 6-2 6-1 | | | | | | | | | |
11‑Mar‑2019 | M15 Nishi Tokyo | Hard | R32 | 399 | | Sekiguchi d. (JR )Keisuke Saitoh [JPN] | 6-3 6-2 | | | | | | | | | |
4‑Mar‑2019 | M25 Mildura | Grass | SF | 399 | 380 | (2)Brydan Klein [AUS] d. (4)Sekiguchi | 6-7(2) 6-1 6-1 | | | | | | | | | |
4‑Mar‑2019 | M25 Mildura | Grass | QF | 399 | 464 | (4)Sekiguchi d. Yuta Shimizu [JPN] | 6-3 6-3 | | | | | | | | | |
4‑Mar‑2019 | M25 Mildura | Grass | R16 | 399 | | (4)Sekiguchi d. Issei Okamura [JPN] | 6-3 3-6 6-2 | | | | | | | | | |
4‑Mar‑2019 | M25 Mildura | Grass | R32 | 399 | | (4)Sekiguchi d. Alexis Canter [GBR] | 7-6(5) 6-1 | | | | | | | | | |
25‑Feb‑2019 | M25 Albury | Grass | SF | 397 | 379 | Brydan Klein [AUS] d. Sekiguchi | 6-3 6-2 | | | | | | | | | |
25‑Feb‑2019 | M25 Albury | Grass | QF | 397 | 495 | Sekiguchi d. (8)Thomas Fancutt [AUS] | 5-7 6-1 6-4 | | | | | | | | | |
25‑Feb‑2019 | M25 Albury | Grass | R16 | 397 | | Sekiguchi d. Vincent Stouff [FRA] | 4-6 6-1 6-2 | | | | | | | | | |
25‑Feb‑2019 | M25 Albury | Grass | R32 | 397 | | Sekiguchi d. Alexis Canter [GBR] | 6-2 6-1 | | | | | | | | | |
7‑Jan‑2019 | Da Nang CH | Hard | R64 | 396 | 384 | Viktor Durasovic [NOR] d. Sekiguchi | 6-3 6-2 | | 0.43 | 4.0% | 0.0% | 54.0% | 63.0% | 39.1% | 2/5 | 1:01 |
31‑Dec‑2018 | M25 Hong Kong | Hard | R32 | 396 | 353 | (3)Carlos Boluda Purkiss [ESP] d. Sekiguchi | 7-5 6-4 | | | | | | | | | |