Director and General Manager of business operations at ATA

Managing successful relations with all ATA clientele and key stakeholders

ATA financial controller with 20+ years corporate experience

Accredited and practising tennis coach for over 25 years

Player manager for ATA athletes competing at the highest level, including the Australian National Championships and December Showdown annually

“Work Hard – Have Fun – High Standards”

Theo Dalkos
ATA Director and General Manager – 0432938912

With 17 years of coaching experience in Australia and Germany (1 year), Luke Sebastiani is a highly respected figure in player development. He works with athletes from green ball tennis through to high-performance national competition.

Luke is a Tennis Australia Club Professional Coach. He brings a wealth of knowledge, energy, and professionalism to every stage of the player pathway.

He is a 2x South Australian Men’s State League Champion and a current competitor on the State League and Australian Money Tour circuits. He also has playing and coaching experience in Germany’s competitive club league.

In addition to his coaching, Luke is a professional hitting partner for top 100 ATP and WTA players. This experience gives his athletes rare insight into the standards and demands of the world’s best.

His coaching philosophy focuses on building athletes who are strong, efficient movers and technically sound players who are mentally tough. He applies principles from internationally recognised movement specialists.

Luke holds a Bachelor’s Degree in Primary/Middle School Education from the University of South Australia. This background supports his structured and developmental approach to coaching.

Outside of the court, Luke is the creator and host of the “ATA Going Pro” podcast. He interviews professional players, coaches, S&C experts, and industry leaders, sharing the stories and strategies behind their success.

Luke Sebastiani
ATA Director and Head Coach – 0414244407

Specialising in High Performance Junior Development at ATA, with over a decade of coaching & playing experience.

Former NCAA Division 1 College Player with coaching experience at world renowned academies including Barcelona Tennis Academy & Emilio Sanchez Academy.

Accredited Tennis Australia Club Professional and Emilio Sanchez Academy – Barcelona Certified Coach. Bachelor of Commerce from the University of Adelaide & North Carolina State University.

Highly successful corporate career post graduation working for a FTSE 250 Multinational Firm, before returning to work in his true passion of coaching Tennis.

When Sami is on court, expect to push beyond your limits and unlock your full potential.

Sami Chowdhury ATA Senior Coach – 0424779641

ATA Junior Development Coach including Green Ball and Mini’s program

ATA Social Media and Marketing lead coordinator

University of Adelaide, Bachelor of Physiotherapy student

South Australian Men’s State League current player

Sets the playing standard and intensity level at our 2 hour hitting squads

When Dylan is on court, be ready to move fast and have some fun

Dylan Truong
Junior Coach – 0426594117