ITF singles ranking 40+ :  606

2022
GPTCA C-Level International Coach 
 
2020
ITF Academy Qualifications
 
2014
DTB Referee

2013 
USTA diploma trainer
 
1996
VDT Coach
 
1995
DTB Tennis Coach
 

Academic

Master of Business Administration (Accounting & Controlling)

Holger Zöller

Email: office_FZ-ProSport@freenet.de