Hiromasa Koyama (JPN)
Country: Japan,
Born in 2007 (17 years old),
Category: ATP
ATP Ranking
2102
10
Season High : 1951
Career High : 1925
ITF Ranking
95
-4
Season High : 76
Career High : 76
| Tierlevel | Tourn. | Titles | Matches | Wins | Losses | PCT | 6-0 | 0-6 | 7-6 | 6-7 | Total | 11 | 0 | 15 | 4 | 11 | 0.267 | 0 | 3 | 1 | 1 |
|---|---|---|---|---|---|---|---|---|---|---|
| M15 | 4 | 0 | 4 | 0 | 4 | 0.000 | 0 | 1 | 0 | 0 |
| JR Grand Slam Boys | 1 | 0 | 1 | 0 | 1 | 0.000 | 0 | 1 | 1 | 0 |
| J300 Boys | 4 | 0 | 6 | 2 | 4 | 0.333 | 0 | 1 | 0 | 0 |
| J200 Boys | 2 | 0 | 4 | 2 | 2 | 0.500 | 0 | 0 | 0 | 1 |
Tournaments played in 2025
See detailed tennis results of Hiromasa Koyama| Apr 28 | J300B | 1/16 | J300 Nonthaburi (Asia/Oceania Regional Championships), Nonthaburi(THA) |
| Apr 22 | J300B | QF | J300 Kuching \ ITF World Tennis Tour Juniors J300 Premier Sarawak Cup I, Kuching(MAS) |
| Apr 15 | J200B | 1/8 | J200 Kuala Lumpur \ Kuala Lumpur ITF World Tennis Tour Juniors, Kuala Lumpur(MAS) |
| Mar 31 | M15 | 1/16 | M15 Kashiwa 04, Kashiwa(JPN) |
| Mar 24 | M15 | 1/16 | M15 Tsukuba 03, Tsukuba(JPN) |
| Mar 17 | M15 | 1/16 | M15 Nishi-Tokyo 02, Tokyo(JPN) |
| Mar 10 | M15 | 1/16 | M15 Hinode 01, Hinode(JPN) |
| Mar 03 | J300B | 1/16 | J300 Nonthaburi \ LTAT ITF Junior Tournament, Nonthaburi(THA) |
| Feb 24 | J200B | 1/8 | J200 Nonthaburi \ PTT ITF Juniors Grade 2, Nonthaburi(THA) |
| Jan 18 | GS B | 1/32 | Australian Open, Melbourne(AUS) |
| Jan 18 | GS B | [Q] | Australian Open, Melbourne(AUS) |
| Jan 10 | J300B | 1/32 | J300 Traralgon \ Loy Yang Power Traralgon International, Traralgon(AUS) |
| Jan 10 | J300B | [Q] | J300 Traralgon \ Loy Yang Power Traralgon International, Traralgon(AUS) |
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