LETZServ Luxembourg is a Limited Liability Company (LLC) which was established on August 26, 2013.

Based in Luxembourg, it provides services appealing to athletes as well as clubs and sports organizations.
Experts in training, coaching and management, LETZServ provides customized and individualized solutions to its customers.
With a quality orientated work based on the development and long-term performance of the athletes, LETZServ offers services in several sports, at all levels of practice and for all ages.
From professional to recreational athletes, LETZServ offers to every single one of its athletes his sport on his level with his goals and especially the joy of progress.

Who are the founders and/or the staff of this structure?
Alexandre LisieckiSports Coordinator
Frank EicherStrength and Conditioning
Michael BellacaPhysical coach
Nathalie AlcarazSecretary
Marc DelpierreCoach in human resources
Marie LannersSports Psychologist & Mental Coach
Gilles Muller

Gilles Muller, married, father of two children, professional tennis player since 2001.

Winner of the U.S. Open Junior 2001 and Junior World Champion in the same year. Winner of 6 ATP Challenger tournaments and 4 Futures.

Finalist at 3 ATP Grand Prix tournaments and 13 ATP Challenger tournaments. 34 appearances in Grand Slam tournaments with the highlights of a 1/4 and a 1/8 final.

Participation at the Olympic Games in London (2012).

Member of the Luxembourg Davis Cup team (since 2000, 48 wins in 65 tennis matches).

Best World ATP Ranking: 42 in 2011.

His greatest victories: R. Nadal, A. Agassi, A. Roddick, D. Nalbandian, N.Davydenko, R. Gasquet, M. Fisch, G.Gaudio, T.Haas, N. Almagro, J. Johansson.
Jacques Radoux

Jacques Radoux, father of two children, legal secretary at the Court of Justice of the European Union (since 1998).

Master's degree in Law and a degree in legal and moral sciences at the University of Aix-Marseille III.

Former player (1987-1995) and captain (2008-2013) of the Luxembourg Davis Cup team. Best singles ranking : 32 ITF and 458 ATP. State-approved tennis coach degree.

Adviser of Gilles Muller and head of the Tennis section at Special Olympics Luxembourg.

Member of the Luxembourg Arbitration Commission for Sport and arbitrator at the Court of Arbitration for Sport in Lausanne.
Alex Benoy

Alex Benoy, remarried, father of three children from the first marriage, accountant for over 25 years.

Economic advisor and sports manager for many years. He remains to this day a very personal and enthusiastic conversation partner for new projects in the sports and interpersonal relationships.

Freed from his trust company, which he sold recently, he believes with body and soul in the project LETZServ and predicts a great future ahead, both nationally and internationally, with the best participants available in the Grand Duchy of Luxembourg.
Alexandre Lisiecki

Alexandre Lisiecki, father of one child, Sports Coordinator at LETZServ.

National Technical Director at the Luxembourg Tennis Federation (2008-2013), coach of the Luxembourg Davis Cup (2009-2013) and Fed Cup (2011-2013) teams.

Coach of Gilles Muller (since 2010).

Athletic department advisor to the French Tennis Federation (2008).

Elite coach at the MOURATOGLOU Tennis Academy (2005-2008).

State-approved 1st degree tennis coach in France (1996), formation in Roland Garros and acquiring of the state-approved 2nd degree in tennis (2000).
Frank Eicher

Frank Eicher, married, father of 2 children. Head of physical preparation at LETZServ.

Master's degree in engineering from preparation to performance at the University of Montpellier 1 in 2006 and state-approved 1st degree tennis coach in France.

Sports teacher competition in Luxembourg in November 2006 and since September 2010 working at Hubert Clément School in Esch-sur-Alzette in Luxembourg.

Physical trainer at the Luxembourg Tennis Federation, responsible for the national Davis Cup (2006-2013) and Fed Cup (2008-2013) teams and the national training center (2008-2013).

Since 2010, physical trainer of Gilles Muller.

2010-2013 captain of the Luxembourg Fed Cup team.

As a tennis player : member of the Luxembourg Davis Cup (2001).
Jennifer Longin

Sports coach at LETZServ.

State-approved 1st degree tennis coach in France (2007)
State-approved 2nd degree tennis coach in France (2009)
Experience as a player in different academies (Bolletieri / Sanchez-Casal) and on the WTA tour.
ITF instructor
Michael Bellaca

Coach physique chez LETZServ.

Bac économique et sociale en 1997
Licence STAPS à la faculté des sports de Nancy en 2000
Certification FMS en 2015
12 ans d'expérience dans le personal coaching à Luxembourg, Metz, et Thionville
Sports pratiqués : Tennis en seconde série, Handball en pré nationale
Nathalie Alcaraz

Administrative Secretary at LETZServ.
Marc Delpierre

Coach in human resources at LETZServ.

For over 20 years Marc Delpierre, independent trainer and coach in Human Resources, assists companies, managers and their teams in times of reflection, change, development, merge. Topics developed are as diverse as change management, team dynamics and team coaching, re-association of employees in the corporate culture, stress management, leadership and decision making.
In collaboration with the Academics, he created trainings related to collaborative transition, collective and mutual trust, intrinsic and extrinsic motivation. Judoka, sports enthusiast, he coaches athletes and teams in their mental preparation in disciplines as diverse as tennis, swimming, triathlon,rugby, hockey.

More than 20 years of experience have led him to develop a methodology the "Form Action", a staggered approach, combining dynamic, metaphorical message and experimentation by action leading to real changes in behavior and attitudes.
Marie Lanners
Sports Psychologist & Mental Coach LETZServ.

Master in Psychology at Université Libre of Bruxelles, Sports Psychology in Innsbruck and Switzerland, Master in professional mental coaching in sports performance at Ecosport and Unicoach, Paris.
Practitioner in NLP Neuro-Linguistic-Programming, ericksonian Hypnotherapy, EFT, Personnality Profiles in Sport Nuances, Wingwave Coaching.
Mental training of high level athletes in Luxembourg, Belgium, France, Switzerland, Monaco.
Mental trainer of Gilles Muller (since december 2014).
More than 10 years of experience in tennis, table tennis, golf, car racing, triathlon, cyclism, marathon, swimming, soccer, athletics, ice hockey, figure skating, alpine skiing, mountain skiing, cross country skiing, snowboarding, archery.... Teambuilding. Coach the Coach.
  • Member of SASP Swiss Association of Sports Psychology.
  • Membre of FSP Swiss Federation of Psychologists
  • Membre of FCSP French Federation of Professional Sports Coaching
  • Membre de la SLP Luxembourg Psychological Society
  • Membre de l’ ADN Nuances Development Association