The 2003 ITF Seniors World Individual Championships took place on 17-24 August in Hannover, Germany.
The champions in each age category are listed below, or click the link to view the full results and drawsheets from the tournament.
- Results and drawsheets
35s
- Men's singles: Guido Van Rompaey (BEL)
- Men's doubles: Girts Dzelde (LAT) / Torben Theine (GER)
- Women's singles: Rene Simpson (CAN)
- Women's doubles: Heike Thoms (GER) / Lucie Zelinka (AUT)
40s
- Men's singles: Anders Jarryd (SWE)
- Men's doubles: Tom Coulton (USA) / Anders Jarryd (SWE)
- Women's singles: Regina Marsikova (CZE)
- Women's doubles: Mary Dailey (USA) / Diane Fishburne (USA)
45s
- Men's singles: Fernando Luna (ESP)
- Men's doubles: Pierre Godfroid (BEL) / Heiner Seuss (GER)
- Women's singles: Patricia Medrado (BRA)
- Women's doubles: Ros Balodis (AUS) / Vicki Collins (AUS)
50s
- Men's singles: Radovan Cizek (CZE)
- Men's doubles: Max Bates (AUS) / Andrew Rae (AUS)
- Women's singles: Evgenia Birukova (ITA)
- Women's doubles: Elizabeth Allan (AUS) / Kerry Ballard (AUS)