Our Coaches


Marcos Ondruska

Prior to Marcos's coaching career, he traveled on the ATP tour, where he reached a career-high singles ranking of #27 in the world and #34 in the world in doubles. He competed in more than 48 Grand Slams and reached the Round of 16 in the Australian Open in singles as well as the doubles semifinals. He reached three ATP tour event finals and won four doubles titles during the course of his career.

Ondruska maintains two wins over world No. 1’s and boasts additional wins over tennis legends such as Michael Chang, Brad Gilbert, Petr Korda and Wayne Ferreira. He competed on behalf of South Africa at the 1996 Olympics and played on South Africa’s Davis Cup team for eight years, where he currently serves as captain.


Jack Streeter

Jack Streeter grew up in London and began playing tennis at eight years old. After thriving at the high-performance level himself, Jack has firsthand knowledge of what it takes to reach your highest potential and recognizes how striving for excellence can shape your character and way of life. He embraces cross training and believes it's key in becoming a better athlete.

Jack is extremely passionate with what he does, and wants to help you reach your goals, on and off the court.


Mark Shkrebtan

Born in Moscow, Russia, Mark came to America at age three and started playing tennis by age five. He paved the way as a top-ranked junior in the Pacific Northwest before playing Division-I tennis at Seattle University, where he competed in the #1 singles and #1 doubles positions all four years.
Mark has been coaching and developing junior programs since he was 15 years old. He has coached with Scott Shogreen, Vitaly Gorin and at various facilities, including the Pro Sports Club and Central Park Tennis Club.


Henry Barkhudariyan

Henry was born in Kirkland, Washington and started playing tennis at four years old. He spent the entirety of his junior tennis career playing at the high-performance level and graduated from Bellevue High School in 2014, where he led the varsity team to win two state championships.

Henry has coached high performance programs in various clubs on the Eastside. In addition to coaching, Henry is extremely passionate about helping out in his community. He has been an avid volunteer with the Bellevue School District, where he started an after school tutoring program.