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JPN

Koki Watanabe

Japan · Men's singles, men's doubles and mixed doubles · 2015 to 2026

Born 29 January 1999 · Right-handed · 166 cm

255
matches
59%
won
3
senior titles
7
finals
World ranking
16Men's singles
59,570 points

Best 16 on the lists we hold, from 21 Sep 2026. Career high 11 in men's singles, 22 Oct 2024. In the weekly top lists of men's singles for 58 weeks (2024 to 2026), best 11th.

Our ratingHow it works
1,826Men's singles
rated 11 Oct 2026

16th of 548 rated in the last 12 months. Highest 1,865.

Form
6/10won of the last
10 matches
  1. L
  2. W
  3. W
  4. W
  5. L
  6. L
  7. L
  8. W
  9. W
  10. W

Latest: lost to Yushi Tanaka, Arctic Open 2026, semi-final. Newest on the left.

Season by season

Matches played and won, year by year.

  • Played
  • Won
  • A title that year
'15
'17
1 '19
'21
1 '23
1
'25
'26
Show the numbers
YearPlayedWonTitles
202638210
202528120
202443271
202340261
20221460
2021720
2020310
201928211
20181380
201716110
20161050
201515100
Titles

3 senior titles.

Every final won, newest first. Each opens that edition's draw.

  1. 2024 Canada Open Men's singles beat Alex Lanier 20–22 21–17 21–6
  2. 2023 Swiss Open Men's singles beat Chou Tien-chen 22–20 18–21 21–12
  3. 2019 Orléans Masters Men's singles beat Thomas Rouxel 18–21 21–12 21–19
Recent matches

The last 20 matches.

Scores read from Koki Watanabe's side.

Denmark Open 2026Men's singles Round of 32 Leong Jun Hao Not known
Arctic Open 2026Men's singles Semi-final Yushi Tanaka 14–21 21–11 16–21 Lost
Quarter-final Chou Tien-chen 21–19 21–16 Won
Round of 16 Brian Yang 21–17 20–22 21–15 Won
Round of 32 Wang Tzu-wei 21–14 21–18 Won
China Masters 2026Men's singles Round of 32 Jason Gunawan 12–21 17–21 Lost
China Open 2026Men's singles Round of 32 Panitchaphon Teeraratsakul 19–21 19–21 Lost
Japan Open 2026Men's singles Final Christo Popov 11–21 19–21 Lost
Semi-final Yushi Tanaka 19–21 23–21 21–19 Won
Quarter-final Anders Antonsen 21–13 21–17 Won
Round of 16 Nhat Nguyen 21–15 21–19 Won
Round of 32 Lakshya Sen 21–16 21–14 Won
Indonesia Open 2026Men's singles Round of 16 Victor Lai 10–21 9–21 Lost
Round of 32 Brian Yang 21–19 21–15 Won
Singapore Open 2026Men's singles Semi-final Loh Kean Yew 15–21 21–15 9–21 Lost
Quarter-final Lakshya Sen 21–19 15–21 21–15 Won
Round of 16 Lee Cheuk Yiu 21–17 21–12 Won
Round of 32 Wang Tzu-wei 21–17 21–13 Won
Malaysia Masters 2026Men's singles Round of 32 Christo Popov 21–14 22–24 16–21 Lost
Thailand Open 2026Men's singles Quarter-final Shi Yuqi 14–21 21–13 16–21 Lost
Partners and rivals

Who with, and who against.

Head to head counts every draw match between them, in any event.

Partners

Rivals