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Coaching Team

Alexander MacKellar and Keeley Phillips (both former collegiate players with over 17 years of combined coaching) founded the Mack Phillips Tennis Academy in 2019. We offer a tennis experience catering to all age and skill levels. We look forward to sharing our passion and knowledge of the sport with you!

Keeley Phillips
Head Coach

Coach Keeley has been playing tennis seriously for over 10 years and coaching for over 8 years. She attended Cedar Ridge High School where she was awarded team MVP and played #1 mixed doubles. After High School she continued her playing career as a member of the women’s tennis team at Concordia University Texas. She graduated in 2020 with a major in Business Administration and a minor in Kinesiology. Coach Keeley’s favorite things about tennis are its ability to bring communities and families together, and the fact that it is a lifelong sport! Her coaching approach is very tailored to the player and their goals; however, she is a firm believer in creating strong fundamentals to prevent injury and allow players to reach their full potential. She has experience working with kids ages 2 all the way to seniors and all skill levels. When she is not on the court, she enjoys running, baking, DIY projects and spending time with her family.

Alexander Mackellar
Head Coach

Coach Alex began playing tennis at age 11 and has been coaching tennis for over 10 years. He attended Belton High School and was a member of their varsity tennis team. After High School, he joined the United States Navy. He spent 2 years in Washington D.C. at the Nation’s capital as a Ceremonial Guardsman. Then, he spent his last 2 years stationed in Bahrain. After the service, he attended the University of Mary Hardin-Baylor where he was a member of the tennis team and graduated in 2019. After graduating, he knew he wanted to follow his passion, tennis, and has been coaching full time ever since. Coach Alex’s coaching style is always adapted to the individual to best suit their needs and goals.

Stephanie Rodriguez

After taking time to raise a family after playing college tennis, Coach Stephanie was eager to pick up a racquet again to play the game she loves, and she hasn’t looked back! In just a few short years she has become a fixture in the Central Texas tennis scene as a 4.5 league and tournament player competing at the Sectional and National levels. She is also a Round Rock Tennis Association board member and a USTA Tournament and League Committee member. She has leveraged her tennis skills and knowledge to teach an after-school tennis program through Round Rock ISD for elementary age students, and loves conducting private lessons to teach the next generation of tennis players to know and love the game. Coach Stephanie has taught elementary school for 33 years, has been married to her husband for 30 years, and has three grown boys.

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Lisa Robertson

Lisa was introduced to tennis at the age of 6 by her father. She competed all across the great state of Texas to achieve the USTA level of Super Champ at age 14. She also attended Aledo High School where she claimed regional titles in doubles and singles all four years before going on to play at University of North Texas.
Through competing and coaching, her philosophy has always been “The winner is the player who has the most fun”. Tennis is a lifetime sport. Lisa believes having fun is the key ingredient for fostering a lifelong love of the game while developing skills, strength and growth both on and off the court.

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Connor Teseny

Coach Connor has been playing tennis for 13 years, starting at Lamar Middle School, and moving to McCallum High School where he was varsity all 4 years, and team captain his senior year. He is currently a 4.5 rated competitive player who loves competing on clay. He has privately coached a wide variety of players, from young to old and beginner to advanced, along with groups of juniors through the CTTA. He likes to utilize a simplified and technical approach to teaching the sport, while most importantly keeping things fun. Off court, Coach Connor is an avid birder, wildlife photographer and artist. You can find him hiking, fishing and spending quality time with his friends.

Nick Guitron

Coach Nick has been coaching tennis for the past 10. Starting off just giving lessons to his beginner high school tennis teammates Nick made his way to director at the world renowned John Newcombe Tennis Ranch. There he was able to help direct junior programs and was one of the head directors for the adult program. Working there for 5 years he learned how to properly teach the sport, no matter the style or student. One of his most memorable accomplishments was being able to coach alongside retired professional players such as John Newcombe, Luke Jenson, Murphy Jenson, Mark Woodforde and Johan Kriek. But more on the fun side, he’s coached Hollywood star Nick Chunland, RedBull Athlete Desmond Smith (not affiliated with NFL), and was able to be hitting partner with WTA professional Raveena Kingsley. With all these experiences he is a perfect choice if you are looking to improve your game and enjoy the sport. He is a firm believer that respect must be present on court and everything in his coaching has a reason. He always likes to remind everyone that tennis can’t be learned in a day, let alone an hour so 100% effort is needed at all times on court to be able to create improvements in your game. If you are ready to work hard and give him all your effort he will not let you down.

"Just showing up is not enough to get better at something. Hard work, goals and dedication creates champions"

-Nick Guitron


Coach Batyr, a lifelong tennis enthusiast who began his journey with the sport at the tender age of 5. Hailing from New York, he quickly rose through the ranks, claiming regional titles in doubles and singles throughout his high school years. Graduating from Kingsborough Community College with a degree in Associate in Science, Coach Batyr's passion for tennis has taken him from the courts of New York to the vibrant tennis community of Austin. With a competitive spirit, unwavering discipline, and a commitment to excellence, Coach Batyr now channels his expertise into coaching, aiming to inspire and elevate players to new heights. Join Coach Batyr on the court and unlock your full potential.

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Ali Abuwala 

My name is Ali and I am currently a 2nd year architecture student at UT Austin! I’ve been playing tennis since I was 12, starting competitive tournaments around the age of 14. I was a USTA super champ and began my coaching career while high school giving private lessons. For the past two years, I have spent my summers running camps and drills with my former coach and continued with private lessons for players of all age and skill levels. I now play competitive doubles for the UT club team, currently ranked line 3 for the school. My style of coaching relates to each individual player, working with their unique strokes to make them the best player they can be. I value having a balance among all your shots rather than mastering one, and I think it helps create all around players that can face any situation. I hope to continue coaching throughout my college career and beyond as my love for this game has only gotten stronger as the years go on! My favorite player is the undisputed greatest tennis athlete of all time Novak Djokovic!

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Jonathan Darnell

Jonathan Darnell started playing competitive tennis in the 7th grade but has been playing for over 30 years.  He was introduced to the sport at a very young age since his mother was a tennis coach.  He played doubles throughout High School and was a 4-year MVP for the varsity team. He has multiple years of coaching experience with middle school- high school players for multiple different school districts. He has also hosted and led yearly summer camps for players ranging from 1st grade through high schoolers. He has been coaching tennis in some capacity for over 18 years.

Josh Roselius

Hello my name is Joshua Roselius and I have coached tennis for the past four years. I am 22 years old and grew up in College Station, Texas. I started playing tennis at the age of 12 and have been playing/coaching ever since. I was trained by multiple coaches including my father, high school tennis coach, and several college coaches. After I finished up my college tennis journey at the University of Mary Hardin-Baylor, I continued my tennis journey as a coach at The John Newcombe Tennis Ranch (for the past 3-4 years). I have taught adult programs, experienced juniors, and first time juniors. Since January 2021 I have been a full time tennis pro/director on the ranch primarily with the summer/winter junior camps and the year round adult programs.

I am excited to continue my tennis journey and interested in the opportunity to meet people with the same love for the sport

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