Tennis Professionals

Meet the Team

Eli Alejo

Director of Tennis

Eli Alejo is a USPTA and PTR certified professional coach. Eli is also a recent TTI (Tennis Teachers Institute) graduate and was mentored by Don Henson, one of the original 18 Master Professionals. He has 13 years of experience teaching tennis and has been playing for 43 years. Eli played high school and college tennis in the Philippines. He’s currently the Head Coach for Whitney High School in Cerritos, CA.

His mission is to provide every athlete a solid tennis foundation, skills, and tools to succeed in order for them to grow without limit. By doing this, Coach Eli has been successful with juniors and high school players to achieve their maximum performance. Teaching tennis has been Coach Eli’s passion and a gift that he loves to share. Not only for its health benefits but also as a tool for a lifetime experience.

Afif Demachkie

Staff professional

Afif fell in love with tennis in his home country of Lebanon where he played college tennis in 2003. HIs love for the game became a love for teaching, and he continued his passion by teaching both private and group lessons.

In 2015 he taught summer tennis camps, and instituted his own school for player development in 2017.  He achieved his USPTA certification in 2018.  He is currently an assistant head coach at Windward high school and teaches for iTennis Cerritos and iTennis La Habra.

He enjoys seeing the smiles on the faces of his students and loves to see their progress.

Dave Moorman

Staff professional

David Moorman has coached many sports throughout his career. He has worked with i9 sports, (basketball, soccer, flag football). Also, youth sports, club soccer and high school soccer and tennis. For the past six years David has coached and trained high school students at Whitney High School as a boys and girls tennis coach.

David’s coaching experience has allowed him to train players from 4 years old up to high school. His passion is developing players to be their best. David enjoys developing youth and supporting their desires by inspiring them through hard work in skills training and having fun! Tennis is one of his greatest passions that he truly loves to coach and play.

John Nguyen

Staff Professional

John caught the tennis “bug” relatively late compared to other players.  He starting playing in the seventh grade at 12 years old and was so enamored with the sport that he didn’t miss a single day of practice for the next two years.

His hard work paid off as he was able to start playing Varsity singles on his high school team as a Freshman and played all four years.

He later walked on to his local junior college team for one year and then returned to coach is former high school team for two years.

One of his tennis highlights was participating in a clinic with former #1 in the world and 7 time Grand Slam winner Mats Wilander.  John was not only able to play with a legend, but also learn many invaluable insights into the game of tennis from one of the game’s legends.

He is PTR certified and feels fortunate to be able to teach tennis,  a game that has taught him autonomy, self-discipline, sportsmanship, and contentment in life.

Alder Gonzalez

Staff Professional

Alder Gonzalez is an avid tennis player and coach who has enjoyed playing the game for 14 years. Alder started as a varsity player as a freshman and showed much promise being selected as rookie of the year. After his high school career, he sought out a new discipline in tennis as a coach. He began coaching at Di’s Tennis Academy where he learned to work with young adults, high schoolers, and kids. Coaching has taught Alder the importance of care in setting a solid foundation for any student who he works with. Alder particularly enjoys observing and learning different styles of play, and finds tennis to not only be and a fun and challenging sport, but a means of self-expression. He desires to help others love and learn the sport while developing a style of play that works for each individual.


Neil Mocann

Staff Professional

Coach Neil Mocann began playing tennis in second grade in Romania. He attended tennis clinics run by tennis legends Ilie Nastase and Bjorn Borg.  Neil’s passion for this classy game was awakened through his participation in these clinics.  As a junior Neil played many tournaments throughout Europe, then moved to the US in his teens where he played at Downey High School playing earning a spot as the #1 on the team. He went on to play at Cal state LA. He then joined the ITF tour for a few years.
Neil has had the privilege of hitting with some pros such as Novak Djokovic and Goran Ivanisevic. He has over 25 years of coaching experience , and has worked with top juniors in US. He is USPTA certified and ready to help avid players reach their goals. 

Eric Morgan

Staff Professional

Eric is a certified tennis coach under the Professional Tennis Registry (PTR) and International Tennis Federation ( ITF level 1 and 2). He has been a tennis coach for 19 years and has acquired  vast experience in the field of coaching in all class levels of players including working in other countries. As a coach, he has developed many junior players in the Philippines, Bahrain and China. He was named NCAA coach of the year in 2003.
As a player, he was a junior champion, a representative for the Junior Davis Cup in 1990 and 1991 and a former Top 10 Mens singles player of the Philippines. He is a challenging and dedicated Tennis Coach who is able to tap into the potential of the new generation of tennis players.