Jack Kostrinsky (USA)
Country: United States of America,
Category: Junior, Boys
Tournaments played in 2019
See detailed tennis results of Jack Kostrinsky| Jul 15 | B18 | 1/64 | National Clay Court Championships, Delray Beach, FL(USA) |
| Jun 29 | B18 | 1/32 | USTA National Level 2 Tournament, Oklahoma City, OK(USA) |
| May 04 | B18 | 1/16 | USTA National Level 3 Tournament, Las Vegas, NV(USA) |
| Apr 20 | B18 | 1/16 | USTA National Level 3 Tournament, Las Vegas, NV(USA) |
| Mar 23 | B18 | 1/16 | USTA National Level 3 Tournament, Las Vegas, NV(USA) |
| Jan 26 | B18 | 1/16 | USTA National Level 3 Tournament, Las Vegas, NV(USA) |
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