USTA National Level 2 Tournament- FebruaryStart Date: 2/10/2018  End Date: 2/12/2018
Boys' 12 Singles (Draw Line - 10)
32(3) Cal Wider d. Kosei Ogata6-2; 6-1
 Consolation:
R2Krish Arora d. Kosei Ogata6-4; 6-0
R1Kosei Ogata d. Ian Miller6-1; 6-2
Boys' 12 Doubles (Draw Line - 9)
16Dandler/Tallakson d. Hathalia/Ogata7-5
Stockton Junior ChampionshipsStart Date: 1/20/2018  End Date: 1/28/2018
Boys' 12 Singles (Draw Line - 64)
F(2) Kosei Ogata d. (7) Min Htun
SF(2) Kosei Ogata d. Martin Duris7-6(3); 7-5
Q(2) Kosei Ogata d. David Iglesias6-0; 6-2
16(2) Kosei Ogata d. Eugene Lee6-3; 6-0
32(2) Kosei Ogata d. Julian Morris6-2; 6-1
Boys' 12 Doubles (Draw Line - 5)
PL(3) Ogata/Ogata d. (2) SAID/Tandon8-3
SF(1) Dayal/Gannavarapu d. (3) Ogata/Ogata8-3
Q(3) Ogata/Ogata d. NGUYEN/Wu8-3
NorCal Willow Glen Junior Boys' Excellence - Singles OnlyStart Date: 1/6/2018  End Date: 1/15/2018
Boys' 12 Singles (Draw Line - 9)
32Daniel Wu d. (3) Kosei Ogata
 Consolation:
CF(3) Kosei Ogata d. Cooper Han6-2
CS(3) Kosei Ogata d. Martin Duris6-3
CQ(3) Kosei Ogata d. (7) Saarth Gaonkar6-1
R2(3) Kosei Ogata d. Evan Huynh6-4
R1(3) Kosei Ogata d. Tyler Wong6-2; 6-0
Chamisal Junior Championships - National Level 4 for Doubles EventsStart Date: 12/2/2017  End Date: 12/10/2017
Boys' 12 Singles (Draw Line - 1)
Q(8) Jack Van Ness d. (1) Kosei Ogata6-4; 6-3
16(1) Kosei Ogata d. Somei Ogata6-0; 6-2
 Consolation:
PL-S(1) Kosei Ogata d. (5) Arjun Tandon8-3
PL-F(1) Kosei Ogata d. Ajay Ravichandran8-1
Boys' 12 Doubles (Draw Line - 12)
QBhandari/Pallegar d. (4) Ogata/Ogata8-5
B14 B18 Super Series @ UC Santa CruzStart Date: 11/18/2017  End Date: 11/19/2017
Boys' 14 Singles - C (Draw Line - 3)
PLKosei Ogata d. Brandon Huang
SF(1) Krish Arora d. Kosei Ogata7-6(1); 6-1
QKosei Ogata d. Parth Hathalia6-3; 6-3
NorCal 12s Singles Junior Sectionals @ UC Santa CruzStart Date: 10/28/2017  End Date: 11/5/2017
Boys' 12 Singles (Draw Line - 25)
Q(9) Krish Arora d. (5) Kosei Ogata8-6
16(5) Kosei Ogata d. Leo Terman6-2; 6-1
32(5) Kosei Ogata d. Tej Patil6-1; 6-0
64(5) Kosei Ogata d. Jack Van Ness6-4; 6-3
 Consolation:
PL-S(5) Kartik Pandian d. (5) Kosei Ogata8-0
Stockton Junior ExcellenceStart Date: 10/14/2017  End Date: 10/22/2017
Boys' 12 Singles (Draw Line - 13)
16Declan O'Callaghan d. (6) Kosei Ogata9-8(7)
32(6) Kosei Ogata d. Trevor Fong8-0
 Consolation:
R2(6) Kosei Ogata d. Jivan Krishna8-2
USTA National Level 2 Tournament - October Lakewood, CAStart Date: 10/7/2017  End Date: 10/9/2017
Boys' 12 Singles (Draw Line - 2)
32(1) Andrew Salu d. Kosei Ogata6-0; 6-1
 Consolation:
CQ(5) Dylan Charlap d. Kosei Ogata6-0; 6-1
R2Kosei Ogata d. Abhinav Chede3-6; 6-1; 10-7
R1Kosei Ogata d. Josh Stohl6-3; 6-4
Boys' 12 Doubles (Draw Line - 8)
16Coriaty/Ji d. Ogata/Pereverzin6-1
Mike Agassi No Quit - USTA Level 3 TournamentStart Date: 9/23/2017  End Date: 9/25/2017
Boys' 12 Singles (Draw Line - 6)
32(5) Abhinav Chede d. Kosei Ogata1-6; 7-6(2); 1-0(3)
 Consolation:
R2William Kusak d. Kosei Ogata6-3; 6-2
R1Kosei Ogata d. Hardie Bloodworth6-1; 6-1
Boys' 12 Doubles (Draw Line - 13)
16Fralick/Kennedy d. Chundu/Ogata8-1
Niru's Tennis Academy Boys' 14s & 18s Junior Super SeriesStart Date: 9/16/2017  End Date: 9/17/2017
Boys' 14 Singles - D - CMS (Draw Line - 6)
QDarren Wang d. Kosei Ogata6-7(5); 6-4; 6-0
 Consolation:
CFKosei Ogata d. (1) Daniel Arakaki7-6(6); 6-2
CSKosei Ogata d. Ajaysurya Senthilkumar6-3; 6-4
2017 Laguna Creek Junior ExcellenceStart Date: 8/26/2017  End Date: 9/4/2017
Boys' 12 Singles (Draw Line - 28)
QAniketh poruri d. (5) Kosei Ogata4-2; 4-2
16(5) Kosei Ogata d. Saarth Gaonkar4-1
32(5) Kosei Ogata d. Charlie Underwood6-2; 6-2
 Consolation:
PL-S(5) Krish Arora d. (5) Kosei Ogata4-1; 5-3
Boys' 12 Doubles (Draw Line - 7)
PLDayal/Ogata d. (4) Mellachervu/Pandian7-6(6)
SF(1) Moturi/O'Callaghan d. Dayal/Ogata6-3
QDayal/Ogata d. (3) Frantzis/Lopez8-1
16Dayal/Ogata d. Gaonkar/Srikantan8-1
South Bay Junior UTR Round Robin TournamentStart Date: 7/15/2017  End Date: 7/16/2017
Boys' 18 Doubles - W 9 (Draw Line - 2)
R1Chan/Moore d. Huang/Ogata9-7
Boys' 18 Singles - W 9 (Draw Line - 2)
R3Kosei Ogata d. Brandon Huang6-1; 6-7(5); 1-0(6)
R2Kosei Ogata d. Colin Chan6-0; 6-4
R1Kosei Ogata d. Jonathan Moore7-6(3); 7-5
California Level 3 National ChampionshipsStart Date: 7/8/2017  End Date: 7/11/2017
Boys' 12 Singles (Draw Line - 25)
Q(2) Dylan Charlap d. Kosei Ogata6-3; 6-2
16Kosei Ogata d. (5) Hughes Peus7-6; 1-6; 6-3
32Kosei Ogata d. Aaron Hung6-1; 6-0
Boys' 12 Doubles (Draw Line - 13)
16Lambert/Li d. Ogata/Ogata8-2
NorCal 12s Junior Sectional Championships @ Sunnyvale Tennis CenterStart Date: 6/10/2017  End Date: 6/19/2017
Boys' 12 Singles (Draw Line - 8)
16(1) Raghav Jangbahadur d. Kosei Ogata6-1; 6-1
32Kosei Ogata d. (9) Varun Sahasrabuddhe7-5; 7-6(6)
64Kosei Ogata d. Samarth Bala6-3; 6-1
 Consolation:
R3(5) Maxim Sorokin d. Kosei Ogata6-2; 6-2
Boys' 12 Doubles (Draw Line - 21)
16(3) Antonescu/Fuchs d. Hathalia/Ogata8-1
32Hathalia/Ogata d. Hein/Mitchell8-1
12s 14s 16s 18s UTR Round Robin @ Santa CruzStart Date: 5/13/2017  End Date: 5/14/2017
Boys' 18 Singles # 5 - AHS (Draw Line - 0)
R3Brandon Huang d. Kosei Ogata6-4; 2-6; 1-0(6)
R2Kosei Ogata d. Santiago Montgomery6-3; 3-6; 1-0(5)
R1Kosei Ogata d. Aaditya Mellachervu5-7; 6-4; 1-0(9)
Boys' 18 Doubles # 5 - AHS (Draw Line - 2)
R1Huang/Ogata d. Mellachervu/Montgomery8-3
GripSpin Tennis Academy 12s/14s Junior OpenStart Date: 5/6/2017  End Date: 5/7/2017
Boys' 12 Singles (Draw Line - 16)
F(1) Matteo Antonescu d. (2) Kosei Ogata6-3; 7-5
SF(2) Kosei Ogata d. (4) Jonathan Preiss6-2; 6-4
Q(2) Kosei Ogata d. Arnav Kharya6-1; 6-0
16(2) Kosei Ogata d. Tommy Kim6-3; 4-6; 11-9
Gold River Junior ChampionshipsStart Date: 4/1/2017  End Date: 4/9/2017
Boys' 12 Singles (Draw Line - 17)
16Mitchell Lee d. Kosei Ogata6-2; 6-1
32Kosei Ogata d. Arin Pallegar6-1; 6-0
Niru's Tennis Academy Junior UTR Round RobinStart Date: 3/25/2017  End Date: 3/26/2017
CMS Boys' UTR Flight 07 Singles (Draw Line - 0)
R3Kosei Ogata d. Rithvik Katpelly6-3
R2Kosei Ogata d. Ali Kishk6-1
R1Kosei Ogata d. Sai Vaidhyanathan6-3
CMS Boys' UTR Flight 07 Doubles (Draw Line - 1)
FKishk/Vaidhyanathan d. Katpelly/Ogata
Niru's Tennis Academy Junior Open Grand PrixStart Date: 3/4/2017  End Date: 3/5/2017
Boys' 12 Singles - Open (Draw Line - 16)
Q(2) Kosei Ogata d. Ryan Elez6-4; 6-0
16(2) Kosei Ogata d. Dhyey Patel6-1; 6-1
South Bay UTR Round RobinStart Date: 2/25/2017  End Date: 2/26/2017
Boys' 18 Singles - OHS 4 (Draw Line - 0)
R3Jonathan Preiss d. Kosei Ogata1-6; 7-5; 1-0(10-5)
R2William Wenstrand d. Kosei Ogata7-5; 6-0
R1Sai Vaidhyanathan d. Kosei Ogata6-2; 7-6(7-4)
Boys' 18 Doubles - OHS - 4 (Draw Line - 2)
R1Vaidhyanathan/Wenstrand d. Ogata/Preiss8-2
Johnson Ranch Junior Singles ChampionshipsStart Date: 2/18/2017  End Date: 2/20/2017
Boys' 12 Singles (Draw Line - 27)
32(5) Alexander Frantzis d. Kosei Ogata
Round Legend
F  =  Finals
PL  =  Playoff
SF  =  Semifinals
QF  =  Quarterfinals
16  =  Round of 16
32  =  Round of 32
64  =  Round of 64
128  =  Round of 128
256  =  Round of 256
RR  =  Round Robin
QQ  =  Quarterfinal Qualifier
R5  =  Round 5
5Q  =  Round 5 Qualifier
R4  =  Round 4
4Q  =  Round 4 Qualifier
R3  =  Round 3
3Q  =  Round 3 Qualifier
R2  =  Round 2
R1  =  Round 1