The Team

The OTR team consists of extremely talented individuals with impressive competitive backgrounds, as well as extensive international coaching experience.


Graeme Foster – Director of Tennis

Professional Coaching Qualifications

  • Tennis Coaches Australia (TCA) Advanced Coach
  • Former Tennis Director of Pacific Club, Kowloon
  • Former HK Davis Cup player
  • Australian Italia Cup Representative
  • World 35s Doubles R/U Germany 2004
  • HK National Singles and Doubles champion
  • Co-Founder of OTR tennis Asia Ltd.

2013-    Present  Babolat Asia Pacific Promoter

Graeme has an incredible professional coaching background; over 25 years experience teaching all levels of players; coach to many of hong Kong’s and Australia’s top juniors; coach of WTA player; National Touring team’s coach; former HKSI coach.

His hobbies include Muay Thai, boxing,Rugby and Harley Davidsons.


Adrian Montesinos – Programme Director

Professional Coaching Qualifications

  • Tennis Coaches Australia (TCA) Advanced Pro – level 2
  • NASM qualified fitness instructor
  • HK Davis Cup team player 2008
  • HK World 35s team player 2009
  • Winner Men’s Doubles CRC Open – 2000/05/07; South China Open – 2005; National – 2001/07

Adrian has travelled all over the world as a competitor, as well as a coach to former WTA player. He has captured all 3 major doubles titles in Hong Kong.

His hobbies include touch rugby, Muay Thai, snowboarding.


Chris O’Mara – Senior Tennis Professional

Chris is a passionate player and loves to compete, being a regular on the ITF Seniors tour with many Tournament wins all over the world.

His highest ranking is world number 4 in singles and number 1 in doubles.
Chris is a qualified elite AATC coach with experience teaching all levels of players.
Chris will be focusing on our development squads and ladies team coaching.

Steve Whitecross – Professional

Professional Coaching Qualification

  • Australian Tennis Professionals Advanced Coach
  • Head Coach at the Hoppers Crossing Tennis Centre in Victoria 1978-1994
  • Head Coach at the Mooloolaba Tennis Centre 1997-2006
  • Coach / Manager at Peregian Tennis Centre 2007-2009
  • Senior Tennis Pro 2010-2011 HK Cricket Club
  • ITF Seniors World Ranking # 14, 2010
  • Asian Seniors Winner 2009
  • Australian Finalist 2009. Silver Medal in World Championships Teams Event

Steve comes from a family of tennis players, and continues to compete in ITF Senior tour events to this day. His vast experience and his contagious energy has added something special to OTR’s Team of Professionals.

His hobbies include AFL Footy, golf, beach, movies and rock music.

Kennex Abadia – Professional Chinese International School, Victoria Shanghai Academy Team coach

Professional Coaching Qualifications

  • Professional Tennis Registry (PTR) – Professional
  • Playing Coach at CHED (Commission on Higher Education) National Games
  • Varsity Team Captain of University of San Jose-Recoletos

Kennex is a former Junior ATF player and still competes in Hong Kong and in the Philippines. He comes from a family of competitive tennis players where playing and coaching is a passion. He has been coaching full time since completing his university degree in 2012.

His hobbies include music, gaming, scuba diving, reading and research, and photography. He is a avid car enthusiast.

Vijay Kumar  – Head Professional HKIS Primary

Vijay is an experienced Professional from the beautiful country known for its colourful culture – India.

8 years of coaching experience specialising in juniors.

Professional Qualifications

  • ITF Level 1 New Delhi 2008
  • AITA India
  • RPT Registro Professional De Tennis 2015
  • AITA National workshop New Delhi 2009, 2011
  • ITF International Coaches Conference Bangkok, China
  • ITF Worldwide Coaches Conference by BNP Paribas, 2019 & 2021
  • Attended the It’s My Game ll Virtual Conference by Professional Tennis Registry, 2021
  • World Tennis Conference by Global Professional Tennis Coach Association,2021 & 2022
  • Virtual Australian Open Grand Slam Coaches Conference, 2022

His hobbies including playing cricket, watching movies and music.

Nel Rudas – Professional

Coaching qualifications:
•    UK LTA Level 1
•    RPT Tennis Spain.
•    Bachelor of Sports Studies

Nel has represented the Philippines Federation Cup teams from 2015-2016.

She was a competitive junior on the ITF junior circuit with a world ranking in the top 500. Nel is looking forward to competing in local tournaments here in Hong Kong.

She has been working with junior players for 4 years now and her patience and enthusiasm is a contagious asset to OTR and the Manhattan.

Edz Balanga – Professional HKIS Varsity Teams

Edz has been teaching in the Philippines and Spain with qualifications:

•    Professional International Coaches Institute
•    National Professional Europe RPT
•    Professional Spanish Tennis Federation

Edz has represented the Philippines in Federation Cup as well as competing in Europe and Asia. She continues to be  a top 3 player with many titles in both singles and doubles.

Edz will be coaching the HKIS Varsity teams as well as private lessons at HKIS Tai Tam.

Ronnie Doctrove – Professional

Professional Coaching Qualifications

  • ITF Certified Elementary Level Coach
  • Former Men’s A league Captain for the prestigious LRC Club in Hong Kong, winning the league under his leadership.

Ronnie has over 15 years tennis coaching experience teaching all levels of players. He places great emphasis on the early development of solid stroke techniques and excellent footwork. Has lived in Hong Kong for many years and is the father of twin boys who advanced to the top level of tennis development in Hong Kong.

His hobbies include football (ex HK professional), basketball, movies and reading.

Alex Herrera – Qualified ATPCA Professional

Alex comes from a tennis background. As a accomplished junior tournament player , a successful coaching career with OTR Tennis Asia before crossing over to focus on becoming an athletic development coach. Alex has also studied directly under world renown Movement specialist Ido Portal since 2011. Alex takes a creative & holistic approach towards personal physical development.

Key Elements of his work
  • Protocols for joint preservation & injury prevention
  • Sustainable tools for enhanced mobility
  • Communication development for improved coordination, rhythm & timing
  • Dynamic power & elastic strength development


Christelle Osmar – Partner – Red Sun Tennis


Christelle was born and raised in the FRENCH Caribbean. She thrives in the heat of Hong Kong , but is all rugged at 20 degrees!
Christelle has been competing since the age of 7 from regional to international level.
Her fitness lifestyle and love of the game continues to inspire her to compete at Senior ITF level, taking last years HK Seniors title .
Christelle’s passion for teaching juniors is infectious and we look forward to seeing her on court soon
Allez Allez !

Ryan Callaghan – Head Professional


  • ATPTCA level 2 Coach
  • Diploma Event Management
  • Nasm Qualified Fitness Coach

Ryan has competed with the best juniors in Australia, later playing College tennis in San Antonio, Texas.

Coaching experience expands all over the world with Australia, USA and now 10 years in Hong Kong. Ryan caters for a wide range of player, whether you are looking to learn new tennis skills or just fine tuning your game
Contact Ryan: +852 5692 5383

Rachelle De Guzman

Rachelle De Guzman – Tennis Professional

Professional Coaching Qualifications:

  • ITF Play Tennis Course Graduate
  • Australian Tennis Professional Coaching Association (ATPCA) Graduate Pro Level 1
  • Bachelor of Arts in Sports Studies at DLSU-Manila.
  • Former Top 10 in Philippines

Rachelle is from the Philippines. She represented the De La Salle University-Manila Lawn Tennis Team for five years (2013-2017). Team captain for two consecutive years. During her UAAP days, she was announced as UAAP Season 76 Rookie of the Year and finished undefeated on her last two UAAP seasons.

Rajander – Tennis Professional

Professional Coaching Qualifications:

  • RPT Mental Toughness Certificate
  • ASIAN Fitness Convention 2011 Certificate
  • GPTCA World Tennis Conference -2021

Rajander is an extremely experienced and Technical Professional from India. He has over 15 years experience with all age groups and is passionate for building players foundation focusing on early development & technique.

Professional Experience :

  • Worked at one of India’s top Academies “Team Tennis” for more than 5 years as Senior Tennis Coach.
  • “BAI DONG Academy ” Beijing, China for 2 years as a Technical Professional.
  • Worked in many prestigious schools in India.
  • Travelling coach to junior ITF players – Egypt, South Africa, Iran, Turkey, Thailand and Vietnam.

Career highlights :

Coach to some of India’s finest –

  • Yuki Bhambri World no.-1 Jr.
  • Tahira Bhatti Asia no.-1
  • Jasmine Kaur Asia no.-3
  • Christopher Marquis ITF Men’s World no.-1259
  • Sandeepti Singh Rao India no.-2 (U-14)
  • Lakshmi Gowda India no.11 (U-18) & ITF JUNIOR-490
  • Best Technical Coach Award AUSTRALIAN OPEN 2009

Raj is available for lessons at HKIS Tai Tam & Manhattan Residents Club. Please contact

Dave Mosqueda – Tennis Professional HKIS Junior Varsity/Varsity Teams

Professional Coaching Qualifications:

  • ATPCA Level 1 Australia
  • Bachelor of Physical Education UST Philippines
  • Sports & Wellness Management UST Philippines
  • Junior ITF World Ranking 944
  • Top 15 Philippines Mens Ranking
  • No 1 Junior Philippines U/16, U18

Dave served as the Co-Captain of the Santo Tomas University Men’s team for five years, relishing the spirit of competition and camaraderie that college tennis offered. He has since been actively playing tennis in his local community in Hong Kong, which has honed his skills and made him a valuable addition to the teams at HKIS. Dave is enthusiastic about imparting his knowledge and love for the game to the students at HKIS.