The Orlando Tennis Series main draw continued on Thursday with a jam-packed day of tennis that saw multiple rounds completed at the USTA National Campus.

The event, which is an ITF World Tennis Tour M15 and W15 event, features some of the top up-and-coming men’s and women’s players from around the world, including both current and former collegians, as well as top American juniors.

All eight quarterfinals spots secured in the women’s singles main draw on Thursday went to Americans, guaranteeing an all-American final on Sunday. The top four seeds, No.1 Grace Min, No. 2 Tori Kinard, No. 3 Connie Ma, and No. 4 Natasha Subhash all advanced with relative ease. They’ll be joined in the quarterfinals by the seventh-seeded Sofia Sewing, rising high school junior Kimmi Hance, as well as qualifiers Karina Miller and Eleana Yu.

The men’s singles main draw wrapped up the first round and finished the second round on Thursday. The upset of the day belonged to 20-year-old Vasil Kirkov who knocked off the top-seeded Keena Mayo in straight sets. Kirkov was one of five Americans that advanced to the quarterfinals, joining fourth-seeded Paul C. Oosterbaan, No. 7 seed Strong Kirchheimer, University of Illinois rising senior Aleks Kovacevic and qualifier Mwendwa Mbithi.

The ITF World Tennis Tour is the new umbrella name for all former USTA Pro Circuit and Junior Circuit tournaments and serves as the player pathway between the junior game and the elite levels of professional tennis.

The Orlando Tennis Series is the second professional tennis tournament to be held at the USTA National Campus this year. In January, the campus welcomed the Orlando Open, an ATP Challenger 90 men’s event that saw American Marcos Giron win the first ATP title of his career.

The main draw continues tomorrow and concludes with the doubles finals of Saturday, June 22, followed by the singles finals on Sunday, June 23. Play begins daily at 9 a.m. Admission to the Orlando Tennis Series is free.

For complete results and a daily schedule of play, click here for the men's homepage and here for the women's.

Thursday, June 20 – Results

Men’s Singles Main Draw – Second Round

Vasil Kirkov (USA) def. (1) Keenan Mayo (USA) 6-3, 6-3

(2) Ricardo Rodriguez (VEN) def. A.J. Catanzariti (USA) 7-5, 7-5

(4) Paul C. Oosterbaan (USA) def. George Botezan (ROU) 3-6, 7-5, 7-6(2)

Mwendwa Mbithi (USA) def. (5) Felix Corwin (USA) 6-3, 3-6, 7-5

(6) Diego Hidalgo (ECU) def. Peter Bertran (DOM) 6-4, 6-2

(7) Strong Kirchheimer (USA) def. Logan Zapp (USA) 6-2, 6-1

(8) Alan Kohen (ARG) def. Drew Baird (USA) 7-5, 3-6, 7-6(7)

Aleksandar Kovacevic (USA) def. Ronan Jachuck (USA) 6-7(5), 6-4, 6-2

Men’s Singles Main Draw – First Round

(2) Ricardo Rodriguez (VEN) def. Justin Boulais (CAN) 6-4, 7-5

(4) Paul C. Oosterbaan (USA) def. Michael Shabaz (USA) 6-4, 6-7(3), 6-3

(5) Felix Corwin (USA) def. Zachary Svajda (USA) 6-4, 6-4

A.J. Catanzariti (USA) def. Tyler Zink (USA) 7-6(13), 6-2

Men’s Doubles Main Draw – Quarterfinal

(1) A.J. Catanzarti (USA) / Vasil Kirkov (USA) def. Alan Kohen (ARG) / David Volfson (CAN) 7-5, 7-5

(2) Diego Hidalgo (ECU) / Ricardo Rodriguez (VEN) def. John Harrison Richmond (USA) / Alan Fernando Rubio Fierros (MEX) 7-5, 6-4

(4) Aleksandar Kovacevic (USA) / Keenan Mayo (USA) def. Cash Hanzlik (USA) / Logan Zapp (USA) 6-4, 2-6, [10-8]

Trent Bryde (USA) / Tyler Zink (USA) def. JanMagnus Johnson (USA) / Marcus McDaniel (USA) 6-4, 7-6(7)

Men’s Doubles Main Draw – First Round

(1) A.J. Catanzarti (USA) / Vasil Kirkov (USA) def. Peter Bertran (DOM) / Jordan Parker (USA) 4-6, 6-2, [10-2]

(4) Aleksandar Kovacevic (USA) / Keenan Mayo (USA) def. Paul C. OOsterbaan (USA) / Zachary Svajda (USA) 6-1, 7-6(3)

JanMagnus Johnson (USA) / Marcus McDaniel (USA) def. Drew Baird (USA) / Trey Hilderbrand (USA) 6-4, 6-4

John Harrison Richmond (USA) / Alan Fernando Rubio Fierros (MEX) def. Andrew Lake (USA) / Thomas Lake (USA)

Alan Kohen (ARG) / David Volfson (CAN) def. Alexander Knight (USA) / Mwendwa Mbithi (USA) 7-6(5), 4-6, [10-7]

Cash Hanzlik (USA) / Logan Zapp (USA) def. Alexander Bernard (USA) / Sebastian Murillo (USA) 7-6(5), 6-2

Women’s Singles Main Draw – Second Round

(1) Grace Min (USA) def. Allura Zamarripa (USA) 6-3, 6-3

(2) Tori Kinard (USA) def. Elizabeth Coleman (USA) 6-4, 6-3

(3) Connie Ma (USA) def. Alana Smith (USA) 6-1, 6-1

(4) Natasha Subhash (USA) def. Gianna Pielet (USA) 6-0, 6-0

Karina Miller (USA) def. (6) Joelle Kissell (USA) 6-2, 7-5

(7) Sofia Sewing (USA) def. Giorgie Jones (AUS) 6-2, 6-0

Kimmi Hance (USA) def. Lauren Proctor (USA) 6-4, 6-4

Eleana Yu (USA) def. Madeleine Kobelt (USA) 6-4, 2-6, 6-2

Women’s Doubles Main Draw – Quarterfinals

Kylie Collins (USA) / Connie Ma (USA) def. (1) Madison Westby (USA) / Amy Zhu (USA) 6-3, 4-6, [10-5]

(2) Allura Zamarripa (USA) / Maribella Zamarripa (USA) def. Anna Sinclair Rogers (USA) / Alana Smith (USA) 6-2, 6-0

Kimmi Hance (USA) / Ashlyn Krueger (USA) def. (3) Madeleine Kobelt (USA) / Louise Kwong (CAN) 6-0, 6-2

(4) Anna Makhorkina (RUS) / Amber Washington (USA) def. Gianna Pielet (USA) / Eleana Yu (USA) 6-1, 7-5

Women’s Doubles Main Draw – First Round

(1) Madison Westby (USA) / Amy Zhu (USA) def. Anastasia Reimcehn (GER)

(3) Madeleine Kobelt (USA) / Louise Kwong (CAN) def. Mayuka Aikawa (JPN) / Sofia Sewing (USA) 6-2, 7-6(3)

Kylie Collins (USA) / Connie Ma (USA) def. McCartney Kessler (USA) / Natasha Subhash (USA) 7-5, 6-4

Kimmi Hance (USA) / Ashlyn Krueger (USA) def. Audrey Ann Blakely (USA) / Kelly Williford (DOM) 6-3, 6-4

Anna Sinclair Rogers (USA) / Alana Smith (USA) def. Emma Davis (USA) / Joelle Kissell (USA) 6-1, 7-6(2)

ABOUT THE USTA PRO CIRCUIT:

With more than 100 tournaments throughout the country and prize money ranging from $15,000 to upwards of $160,000, the USTA Pro Circuit is the largest developmental tennis circuit in the world and the pathway to the US Open and tour-level competition for aspiring tennis players. Now in its 40th year, the USTA Pro Circuit has been a launching pad for many of today’s top pros, including Andy Murray, Maria Sharapova, John Isner, Sloane Stephens, Kei Nishikori, Victoria Azarenka, Caroline Wozniacki and Garbine Muguruza. Follow the USTA Pro Circuit at #USTAProCircuit on social media and at www.procircuit.usta.com.