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Meet The Team

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Julian Wortelboer

Founder & CEO

Julian played tennis professionally and in college before embarking on a career as a club professional. Julian brings the discipline and dedication of being a world-class competitor and over 30 years of private club tennis excellence to every engagement. 

Julian draws on a lifetime of experiences with a wide-range of clubs, clients, competitions and organizations. His experience includes working at the prestigious Longwood Cricket Club (Boston, MA), the exclusive Palm Beach Polo Club (Wellington, FL) and being Director of Tennis for over 22 years at one of America's most distinguished private-club resorts, The Ocean Club (Key Biscayne, FL).

Julian received professional certification from the USPTA and PTR, the PPR (Professional Pickleball Registry), The PPTR (Professional Platform Tennis Registry) as well as a Fitness trainer from AAAI/ ISMA and Spinning/ Indoor cycling.

Julian has been speaker in multiple industry events and conventions focusing in bringing 21st century technology and marketing to tennis.  Julian thrives in the realm of finding ways to marry both traditional and digital media strategies together.

While Julian background is based in rackets sports, he quickly found his niche in executing digital media strategies, building brands, and providing social media guidance for tennis professionals, clubs and businesses.

Julian holds degrees and certifications in Digital Marketing with Google and Facebook Blueprint. He’s currently studying for a master’s degree in digital marketing at Florida International University.

What is more, Julian is the founder and CEO of First Serve Foundation, which he created in 2009, in his bid to touch lives and bring education, prosperity, and meaning to children in need around the world. First Serve Foundation was founded on the belief that we can pool resources to help the less privileged child get access to better education, health, and resources. First Serve Foundation has been providing, families with hope, education, health and the opportunity to break the cycle of poverty.


Ricardo Martinez

Chief Operating Officer

Ricardo Martinez was born in Lima, Peru. "Ricky"  started playing tennis at age 6, part of a tennis family enjoying precious moments on the tennis court. He was national champion in national tennis tournaments in the ages of 14's, 16's and 18's. He traveled to Japan in 1994 and 1996 to Switzerland to represent Peru in Junior Tennis Team NEC World Cup. He played college in NCAA division I and II. Ranking up to 25th player in the Nation Division II beating #4 ranking first match. 


He graduated in FIU as political science major. He followed his passion for tennis starting tennis positions as Head Pro of country club of Coral Gables, Tennis director for Tamiami Tennis Center and currently Director of Tennis and Pickleball at Shula's Athletic Club. He has managed tennis camps in Florida and other states. Ricardo ,managed volleyball and beach volleyball programs at Tamiami Tennis Center when he was tennis director. During summer camps he has managed soccer programs and taught soccer lesson for children. 

Ricky is a certified Pickleball (PPR) coach with years of experience. Promoting and pioneering the pickleball movement in the Miami Area is one of his passions.


Marlen Rivera

Director of Operations

Marlen is the backbone if the company, Marlen's specialties include project management, finance and accounting brand development, strategic market analyses and positioning, charity fundraising, experiential marketing and special event production.


Marlen is responsible for leading the sales and marketing strategy, in addition to coordinating successful working relationships between departments and facilities, market research and planning; strategic direction for promotion and advertising; and directing the day-to-day activities of corporate marketing and sales staff.


Jayel Harster

Sales and Marketing

Jayel's specialties involves customer satisfaction by providing problems-solving resources. Answers customers' questions. ... Accomplishes customer service human resource objectives by recruiting, selecting, training, and coaching employees.


Jayel's communicates job expectations to employees, Plans, monitors, appraises, and reviews job contributions of other, enforces WTM policies and procedures.


Jayel’s achieves customer service objectives by contributing customer service information and recommendations to strategic plans and reviews to the executive team.


Fizz Alee

Graphic Designer & Marketing

Fizz has been our graphic designer artist since 2017, she is our digital and non-digital media creator that includes all labels, flyers, advertising, signage and much more.


Fizz is exceptional in creativity and innovation; she understands the new digital media trends and creates outstanding visual concepts.


Fizz develops all WTM media concepts and layouts for products illustration, content and website.


Matias Islas

  • From Argentina

  • Has been teaching tennis for over 12 years

  • Recreations and Sports Management Bachelor’s Degree from Florida International University

  • Certified Pickleball Coach

  • USPTR/ USPTA certified professional 


Julio Velasquez

  • From Peru

  • Has been teaching tennis for over 50 years

  • Founder and owner of Julio Velasquez Tennis Academy in Peru

  • USPTR (United States Professional Tennis Registry)

  • USPTA (United States Professional Tennis Association)

  • ITF (International Tennis Federation)

  • Coached Top 10 ATP and WTA professional tennis players

  • Certified Pickleball Coach


Kern Pedersen

  • From Denmark

  • Has been teaching tennis for over 30 years

  • USPTA (United States Professional Tennis Association).

  • USPTR (United States Professional Tennis Registry)

  • Barry University assistant tennis coach

  • Former University of Miami Assistant Coach

  • Former University of Notre Dame Assistant Coach

  • Former Rice University Assistant Coach


Francesco Fernandini

  • From Peru

  • Has been teaching tennis for over 4 years

  • USPTR (United States Professional Tennis Registry)

  • Certified Pickleball Coach


Diego Escribano

  • From Argentina

  • Has been teaching tennis for over 30 years.

  • Former Professional player

  • #1 player at Barry University

  • NCAA National Champion.

  • USPTR (United States Professional Tennis Registry)

  • Certified Pickleball Coach

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Daniel Orsanic

  • Daniel Orsanic

  • ATP Tour Professional Tennis Player (1989 – 2002).

  • Career-high ATP Tour world rankings of 107 position in singles (1993) and 24 in doubles (1998).

  • ATP Professional Tennis Coach 

  • National Development Director of the AAT (Asociación Argentina de Tenis) (2014 – 2018).

  • Olympic Tennis Team Captain at 2016 Río Olympics 

  • Davis Cup Captain for Argentina (2015 – 2018). Championship-winning team in Argentina’s history (2016).

  • Television Commentator for ESPN Latin America (2018 – Present).

  • USPTA/ PTR Certified Coach

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