Jack Kosiorowski
Empire Cup National Doubles at RWTTCStart Date: 3/16/2018  End Date: 3/18/2018
Boys' 18 Doubles (Draw Line - 8)
16(8) Prokurat/Roti d. Kosiorowski/Srivastava6-3; 6-2
32Kosiorowski/Srivastava d. Chan/KARNIEWICH6-4; 6-4
 Consolation:
R2moadel/reddy d. Kosiorowski/Srivastava
Eastern Empire Cup National Doubles at GHRCStart Date: 2/2/2018  End Date: 2/4/2018
Boys' 18 Doubles (Draw Line - 3)
16(1) Pellerito/Vasser d. Kosiorowski/Srivastava6-3; 6-4
32Kosiorowski/Srivastava d. Annopolsky/Maronilla6-3; 6-2
 Consolation:
CQ(5) Wang/Wernink d. Kosiorowski/Srivastava9-8(4)
R2Kosiorowski/Srivastava d. Dubilirer/Mohri8-4
Eastern Super Six at RWTTC (National L3)Start Date: 1/13/2018  End Date: 1/15/2018
Boys' 18 Singles (Draw Line - 26)
32Chenhe Li d. Jack Kosiorowski6-4; 6-3
 Consolation:
R2(7) Pieter Wernink d. Jack Kosiorowski4-6; 7-5; 10-2
R1Jack Kosiorowski d. (6) John Warner6-2; 6-1
L1 #KindTennis New Shrewsbury January ChampionshipsStart Date: 1/5/2018  End Date: 1/7/2018
Boys' 18 Singles (Draw Line - 24)
16KARAN AMIN d. (3) Jack Kosiorowski6-4; 6-4
L1 Justin Gimelstob Holiday ChampionshipStart Date: 12/26/2017  End Date: 12/30/2017
Boys' 18 Singles (Draw Line - 24)
16Evan Brady d. (3) Jack Kosiorowski6-3; 6-2
Boys' 18 Doubles (Draw Line - 8)
SFKARNIEWICH/Yamus d. Kosiorowski/Monsanto8-2
Eastern Super Six at Sportime Lake Isle (National L4)Start Date: 10/13/2017  End Date: 10/15/2017
Boys' 18 Singles (Draw Line - 22)
16(4) David Mizrahi d. Jack Kosiorowski6-2; 6-2
32Jack Kosiorowski d. Brandon Grill6-4; 7-6(6)
 Consolation:
CSJonah Jurick d. Jack Kosiorowski6-3; 6-3
CQJack Kosiorowski d. Steven Nazaroff
R2Jack Kosiorowski d. Lantis Wang
L1 Pingry Summer's End ChampionshipStart Date: 8/24/2017  End Date: 8/27/2017
Boys' 18 Singles (Draw Line - 28)
16Bryan Schick d. (5) Jack Kosiorowski6-2
L1 Cary Leeds August ChampionshipsStart Date: 8/18/2017  End Date: 8/20/2017
Boys' 18 Singles (Draw Line - 25)
32Joshua Williams d. (8) Jack Kosiorowski7-5
L1 PWTA August ChampionshipsStart Date: 8/11/2017  End Date: 8/13/2017
Boys' 18 Singles (Draw Line - 9)
SFMehdi Dhouib d. (4) Jack Kosiorowski6-1; 6-0
Q(4) Jack Kosiorowski d. Alexander Nielsen6-3; 2-6; 10-8
16(4) Jack Kosiorowski d. Dominik Pajor7-6(5); 6-2
L1 Mendham Tennis Recruiting College ShowcaseStart Date: 7/20/2017  End Date: 7/23/2017
Boys' 18 Singles (Draw Line - 32)
QRyo Sakai d. (2) Jack Kosiorowski6-4; 6-7(4); 10-4
16(2) Jack Kosiorowski d. Lucas Chan
L1B Jersey 34 July ChallengerStart Date: 7/14/2017  End Date: 7/17/2017
Boys' 18 Singles (Draw Line - 32)
F(2) Jack Kosiorowski d. (4) Ryo Sakai7-5; 6-1
SF(2) Jack Kosiorowski d. Sean Ervine6-3; 6-1
Q(2) Jack Kosiorowski d. Thomas Shung6-4; 6-4
16(2) Jack Kosiorowski d. Alexander McDonald6-0; 6-1
L1 Schenectady Clay Court Independence ChampionshipsStart Date: 6/30/2017  End Date: 7/2/2017
Boys' 18 Singles (Draw Line - 14)
FBryan Schick d. Jack Kosiorowski7-5; 6-1
SFJack Kosiorowski d. Thomas Ito7-5; 6-3
16Jack Kosiorowski d. Patrick Lin6-0; 1-6; 13-11
L1A WOTC June ChampionshipsStart Date: 6/9/2017  End Date: 6/11/2017
Boys' 18 Singles (Draw Line - 13)
SFOliver Obeid d. Jack Kosiorowski6-4; 2-6; 10-5
QJack Kosiorowski d. (2) Patrick Lin
L1A Memorial Championships at Point SetStart Date: 5/26/2017  End Date: 5/29/2017
Boys' 18 Singles (Draw Line - 22)
SFDamien Ruparel d. Jack Kosiorowski6-2; 6-2
QJack Kosiorowski d. Julian Szuper6-1; 4-6; 10-4
16Jack Kosiorowski d. (3) Shawn Jackson
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