A strong Team
for strong players
With passion and commitment, we support young talents on their way to becoming professionals or college players. Our goal is to provide them with the best conditions for their athletic development. Trust, reliability, and patience are our top priorities.
Our Coaching Team
Our experienced coaching team has already worked with the following professionals:
Nicolas Kiefer, Julia Görges, Dusan Lajovic, Andrea Petkovic, Petra Martic, Tobias Kamke, Somdev Devvarman, Treat Huey, Aleksandra Wozniak
Sascha Nensel
Sascha coordinates the entire sports division. His main focus is working with international top and young professionals. As a mentor, he empowers our junior coaches and supports them in developing our aspiring players.
View Bio
Milos Galecic
Director of Fitness
Milos is responsible for the fitness and prevention of our top and young professionals. As a senior coach, he empowers our junior coaches in the athletic field and supports them in developing our aspiring players.
View Bio
Somdev Devvarman
Performance Expert
Somdev is an international partner of our academy. His achievements at the highest level and his extensive tour experience make him a valuable member of our team.
View Bio
Ricardo Gelbke
Ricardo coaches players of all development levels, from starters to young professionals. His hunger for success and incredible energy on the court make him a coach that everyone enjoys training with.
View Bio
Samantha Brdys
Samy is a strength and conditioning coach for our players at all development levels. As a former player at the Nensel Academy, she also assists with on-court sessions. Her incredibly positive energy is a great asset to our team!
View Bio
Michal Osomanski
Michal coaches players of all levels, from starters to young professionals. His strength lies in his patient and calm manner, which especially benefits our players during professional tournament support.
View Bio
Sascha
Nensel
Head Coach
Sascha coordinates the entire sports division. His main focus is working with international top and young professionals. As a mentor, he empowers our junior coaches and supports them in developing our aspiring players.
His many years of work with top players on the ATP & WTA tours and his numerous international successes make him an exceptionally experienced coach with a unique aura on the court.
Former professional and Bundesliga player
A-Trainer and Gold Badge holder of PTCA, Certified Master Professional
2008 Coach of the Year in Germany
Former national coach and head coach of the DTB Federal Base in Hanover
15 years of top-level tour experience with both men and women
Long-term coach of Nicolas Kiefer and Julia Görges
2016: Coach of Dusan Lajovic
2017: Coach of Petra Martić and Tobias Kamke
2017/2018: Coach of Andrea Petkovic
Current coach of Sumit Nagal
Milos
Galecic
MC, CSCS, Director of Fitness
Milos is responsible for the fitness and prevention of our top and young professionals. As a senior coach, he empowers our junior coaches in the athletic field and supports them in developing our aspiring players.
His extensive tour experience at the highest level with both men and women, along with his international successes, make him a highly valuable and extremely professional coach off the tennis court.
Master of Science in Sports Physiology and Sports Medicine at Western Michigan University (WMU)
Certified Strength and Conditioning Specialist (CSCS) since 2006
Career Start: Fitness & Conditioning Coach at a Division 1 College (WMU)
Professional coach since 2008
Worked with: Somdev Devvarman, Treat Huey, Dominic Inglot, Rajeev Ram, Aleksandra Wozniak, Dusan Lajovic, Petra Martic, & Sumit Nagal
Somdev
Devvarman
International High Performance Expert
Somdev is an international partner of our academy. His achievements at the highest level and his extensive tour experience make him a valuable member of our team.
Former No. 1 player in India
ATP Career High: 62
Multiple gold medals in singles and doubles (Asian Games & Commonwealth Games)
Currently: A Tennis commentator on Indian TV
Ricardo
Gelbke
Junior Coach
Ricardo coaches players of all development levels, from starters to young professionals. His hunger for success and incredible energy on the court make him a coach that everyone enjoys training with.
B-Trainer Licene
Extensive coaching experience at German youth championships, numerous ITF Junior tournaments, and ITF Futures.
October 2019 to June 2020: Coach at the Hofsaess Academy in Marbella
June 2020 to October 2022: Coach at DTV Hannover
July 2022 to October 2023: Coach at the Hofsaess Academy in Marbella
Samantha
Brdys
Junior Coach
Samy is a strength and conditioning coach for our players at all development levels. As a former player at the Nensel Academy, she also assists with on-court sessions. Her incredibly positive energy is a great asset to our team!
Ehemalige ITF-Spielerin
Tennis- & Fitnesscoach seit 2018
Michal
Osomanski
Junior Coach
Michal coaches players of all levels, from starters to young professionals. His strength lies in his patient and calm manner, which especially benefits our players during professional tournament support.
A successful youth player with multiple Polish championship titles and numerous TE and ITF tournaments
Tennis coach since 2018
Studies Economics at the University of Wrocław
Our Physio & Mental Coach
Physical health and mental stability are absolutely essential for your professional career goals. For this purpose, we work with a sports physiotherapist and an experienced mental coach.
Dorian Renz
Dorian is available whenever you need him. We’ll promptly arrange an appointment at one of his private practices in Isernhagen or Hanover
View Bio
Achim Grube
Achim supports you with various programs and training methods to develop your mental strength in competitive sports.
View Bio
Dorian
Renz
Physiotherapist
Dorian is available whenever you need him. We’ll promptly arrange an appointment at one of his private practices in Isernhagen or Hanover.
Physiotherapist, M.Sc. in Musculoskeletal Physiotherapy
Osteopathy according to Typaldos (FDM IC Certificates)
Manual Therapy (OMT Degree)
OSB Sports Physiotherapy
Professional Career
2006–2007: Physiotherapy at Beate Renz in Wanzleben
2007–2010: Therapy Center Langenhagen
2010–2015: Medical School Hannover
2011–2015: Head of Physiotherapy at the Olympic Training Center Lower Saxony
Since 2015: Self-employed in two joint practices
Treated Julia Görges (Wimbledon 2012, Stuttgart 2013, Roland Garros 2013 and 2014) and other top athletes from various sports
Achim
Grube
Mentalcoach
Achim supports you with various programs and training methods to develop your mental strength in competitive sports.
Education: Diploma in Education with a focus on Sociology, Psychology, Education, and Adult Education
4 1/2-year advanced training to become a Client-Centered Psychotherapist (HPG), Trauma Therapist (HPG), and Supervisory Instructor (Leibniz University Hannover)
Specialized in resolving performance blocks
40 years with the police force of Lower Saxony
15 years of mental training for special forces in the police
Mental training with athletes in judo, swimming, soccer, golf, and tennis
Trust is an important cornerstone
for long-term and successful cooperation.
Our Team Behind the Team
Stephanie Riedel
Stephie keeps everything running smoothly behind the scenes. With new ideas, she drives the development of the academy forward, always keeping the team and its dynamics in mind. Her goal: a strong team for strong players!
View Bio
Norbert Riedel
Norbert is responsible for planning and coordinating all internal and external processes at the academy.
Stephie Benkendorf
Stephie is a media designer for digital and print media and is responsible for the tennis academy’s website. She also assists with design tasks, ensuring a modern and functional online presence.
Lena Riedel
Lena is primarily responsible for our social media presence and supports the company’s development on various levels.
View Bio
Stephanie
Riedel
Managing Partner
Stephie keeps everything running smoothly behind the scenes. With new ideas, she drives the development of the academy forward, always keeping the team and its dynamics in mind. Her goal: a strong team for strong players!
Athletic Background
1973: Started playing field hockey and tennis
1984–1990: Women’s Field Hockey Bundesliga (HC Hannover)
1990–1997: Field Hockey Regional League (HC Hannover) and Major League (DTV Hannover)
Professional Background
1988: High school diploma (Abitur)
1988–1990: Worked in various companies
1990–1992: Trained as a media designer
1992–1997: Started her own business, founded the advertising agency mac2 Graphics GbR
1997: Founded SR Riedel GbR
2015: Co-founded the nensel academy Nensel-Riedel GbR with Sascha Nensel
Lena
Riedel
Social Media
Lena is primarily responsible for our social media presence and supports the company’s development on various levels.
She holds a master’s degree in Organization, Governance, and Education and primarily works on the development of personnel, teams, and organizations at a leading insurance company.
We benefit greatly from her creativity and diverse expertise in organizational development, copywriting, content production, and social media.
The Academy
Services
More
© 2025 nensel academy | Impressum | Datenschutz | Privatsphäre