Our Coaches


Marcos Ondruska,CEO and Director of Tennis

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.

Click here for information on private lessons with Coach Marcos.


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.

Click here for information on private lessons with Coach Jack.


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.

Click here for information on private lessons with Coach Mark.


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. 

Click here for information on private lessons with Coach Henry.


Anton Saranchukov

Anton was born in Almaty, Kazakhstan and started to play tennis at age 5. He's traveled the world to play various professional events, including ITF tournaments and $15,000-$50,000 futures and challengers.

He's practiced with Justine Henin, Dmitry Tursunov, Andrey Golubev and other well-known ATP and WTA professionals. He moved to the U.S. in 2012, where he began coaching at Redmond Tennis Club and Bellevue Tennis Academy.

Click here for information on private lessons with Coach Anton.


Rudolf Kischel

Rudolf's coaching career started in Latvia as the head coach at Tennis Club Dynamo, where three of his students became members of the national Latvian team. After moving to the U.S., Rudolf worked as a high school tennis coach for 10 years. He also ran a private tennis school where many of his students developed to become nationally ranked junior and collegiate players.

Rudolf is a certified tennis USPTA and PTR tennis instructor and currently runs the Dot Excellence program at RTC. With 38 years of experience, Rudolf has developed a teaching style that rapidly creates high-level junior players.

Maggy Lehmicke

Maggy is a Seattle native who started playing tennis at age 11. She eventually competed on the Nebraska women's tennis team for four years, where she started her sophomore year with a pre-season ranking of #63 in the country. She captained the team and competed in the #1 singles position, as well as #1 and #2 doubles positions, for the next three years.

Maggy has been coaching on-and-off since high school and now coaches both adults and juniors at RTC. In addition to coaching, Maggy is also the publisher and editor of Northwest Tennis Magazine, a regional tennis publication that she launched September 2017.

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Alex Arovin

Originally from Donetsk, Ukraine, Alex Arovin came to the United States in 2012. Alex played number one singles at Division 1 Tennessee Tech receiving the 2015 Outstanding Male Athlete of the Year award. A two-time finalist in the men’s National Ukranian Championship, Alex continues to play actively in the Pacific Northwest where he is currently the Number 1 ranked Men’s 18 and Over player.

Currently teaching private and group classes at RTC, Alex has been coaching students since 2012. As a coach, Alex focuses on matching a player’s skill and mental awareness realizing that ideas and skill need to develop in tandem. He focuses on a results-oriented approach believing the greatest motivator for a player's growth is to see tangible results. Alex is open to teaching players of all ages and levels as long as the player is goal oriented and focused on improving.

Click here for information on private lessons with Coach Alex.