Stefan Wagen

Tennis

On the court

Stefan Wagen — tennis portrait

Tennis is the long-form thing outside work. Eight years of competitive tennis in Switzerland, seven years stringing rackets for myself and a small client base, five years on the Tennis Club Horgen board through three elected roles. Competitive, technical, institutional — same sport, three relationships with it.

Player — Swiss ranking

2018-07 – present

Eight years on the Swiss ranking ladder. Career best R4 in October 2024; held R5 consistently since. 230 ranked matches across singles and doubles (as of 15 May 2026).

Started competitive tennis July 2018 at R9 (rank 33,626 of the Swiss ranking system). Eight years on the ranking ladder since.

  • Career best R4 (rank 2,072) in October 2024. Held R5 consistently since.
  • Ranked match record (as of 15 May 2026): 94 wins, 98 losses singles; 21 wins, 17 losses doubles. 230 ranked matches across the eight years.

Stringer and gear advisor

2019-01 – present

Seven years stringing rackets — 750+ jobs total, roughly 120 per year, for myself and a small client base. Racket, string, and tension advisory practice on top.

Started stringing January 2019 for personal use; client work for friends and family followed within the year.

  • 750+ stringing jobs across seven years (as of May 2026). Roughly 120 per year, mix of own rackets and client work.
  • Racket-matching since 2024. Measuring and adjusting static weight, balance, swing weight, and twist weight to match rackets to spec.
  • Gear advisory practice — racket selection, string choice, tension recommendations for the same client base.

Tennis official — Tournament director, Tennis Club Horgen board roles

2021-03 – present

Tennis Club Horgen board roles since 2021 (Director of Interclub and Tournaments → Vice President → President). Swiss Tennis tournament officiating in parallel. Swiss Olympic Club Management certificate (2025) and Swiss Tennis Official certification (2021) on file.

Five-year board arc at Tennis Club Horgen, a Swiss tennis club on the Lake Zürich shoreline. Swiss Tennis tournament officiating across the same window.

Tennis Club Horgen — board

  • Director of Interclub and Tournaments (2021-03 → 2025-03, 4 years)
  • Vice President (2022-03 → 2025-03, 3 years)
  • President (2025-03 → present)

Swiss Tennis tournament officiating

  • Officiated 4 Swiss Tennis-sanctioned tournaments across the period; the largest with 101 registered players.

Certifications

  • Swiss Olympic — “Club Management” course (e-learning + on-site sessions). Issued March 2025.
  • Swiss Tennis Official. Issued May 2021.