Some of the biggest names in the sport are repeat fixtures in the honour roll of World Tennis Champions (formerly known as ITF Champions). Discover the most prolific champions - and the full roll of honour for each award - below.
Esther Vergeer was crowned World Tennis Champion (formerly known as ITF World Champion) in 13 consecutive years during a remarkable period of dominance between 2000 and 2012
Mike Bryan holds the record for the most World Tennis Champion (formerly known as ITF World Champion) accolades in the men's doubles category - one more than his brother Bob, whom he won 11 World Champion awards alongside
Shingo Kunieda was named World Tennis Champion (formerly known as ITF World Champion) for a record 10th time in the men's wheelchair category in 2022, 15 years on from first collecting the award back in 2007
Steffi Graf is the most prolific recipient of the Women's World Tennis Champion award (formerly known as ITF World Champion) with her seven wins putting her ahead of Martina Navratilova and Serena Williams on six
Novak Djokovic holds the record for the most World Tennis Champion (formerly known as ITF World Champion) accolades in the men's category - ahead of fellow serial-winners Pete Sampras (6), and Roger Federer and Rafael Nadal (5)
Eight players have been named World Tennis Champion (formerly known as ITF World Champion) on three occasions in the women's doubles category, including formidable team Barbora Krejcikova and Katerina Siniakova in 2018, 2021 and 2022
The legendary Czech duo of Ivan Lendl and Hana Mandlikova received the opening World Tennis Champion (then-ITF World Champion) junior honours in 1978, paving the way for some of the game's all-time greatest players to use it as a spring board for success - including the likes of Roger Federer (1998) and Martina Hingis (1994)
David Wagner became the inaugural Quad Wheelchair World Tennis Champion (formerly known as ITF World Champion) in 2017. Dylan Alcott ruled the Quad division in 2018, 2019 and 2021, before Niels Vink took over the mantle in 2022