Founded the Toronto Lawn Tennis Club in 1874 and the London Lawn Tennis Club in 1890.
Runner-up at an unofficial U.S. championships in 1880.
Credited with introducing Tennis to Canada.
Won inaugural Canadian international tennis championship title in 1881 known today as Rogers Cup.
Isidore F. Hellmuth was born and raised in Sherbrooke, Quebec in 1845. He travelled to Europe to receive his university education from Cambridge University and then returned home to Canada and became a barrister in London, Ontario and then Toronto. He married Harriet Emily Gamble in 1880. He died in 1944, at his home in Toronto.
Hellmuth was not only a high calibre player during the early stages of Canadian tennis, but he brought several developments to the game of tennis to Canada. He rapidly spread his knowledge of the game throughout clubs around the country. He did not hesitate to change his game based on the growing variety of techniques around the world. Tennis was the sport of the elite in Europe as it was preferred by Kings and Queens. Hellmuth discovered tennis in Canada and built courts around the nation to promote the sport and expand the number of participants.
Hellmuth was the first champion of what became the Canadian Open Tennis Championships (now Rogers Cup) in 1881 by defeating fellow Canadian, W.H. Young. He was also a three-time runner-up 1882, 1885 and 1886. In 1882 he lost H.D. Gamble of Toronto. Hellmuth then lost in consecutive finals in 1885 and 1886, the first to American J.S. Clark 3-6, 6-3, 1-6, 2-6 and the second to his compatriot, Charles Hyman 4-6, 4-6, 6-1, 6-4, 4-6, in the first of Hyman’s four consecutive championships,. That same year Hellmuth and Hyman competed in doubles and captured the title. Hellmuth was also men’s doubles runner-up twice in 1887 and 1891.
He was runner-up at an unofficial United States National Tennis Championship in 1880, before winning the tournament in 1881 at the Toronto Lawn Tennis Club, by defeating fellow Canadian, W.H. Young.
After a two-year hiatus, Hellmuth lost in consecutive finals in 1885 and 1886, the first to American J.S. Clark 3-6, 6-3, 1-6, 2-6 and the second to his compatriot, C.S. Hyman, in the first of his four consecutive championships, 4-6, 4-6, 6-1, 6-4, 4-6. That same year Hellmuth and Hyman competed in doubles and captured the title.
In 1880, he was runner-up at an unofficial United States National Tennis Championship held at Camp Washington on the grounds of the Staten Island Cricket and Baseball Club.(the home of America’s very first tennis court). Described by the New York Times as a left-hander with a tremendous reach, he lost to England’s third best player E.O.Woodhouse in the final.
In 1874 Hellmuth founded the Toronto Lawn Tennis Club on Front Street and the London Lawn Tennis Club in 1890.
“If the first decade of tennis in Canada can be said to be represented by anyone, Hellmuth is undeniably that man. There were others whose names would become better known, and still others who were better players, but it was Hellmuth alone who brought his athletic and mental prowess to the cause. While promoting the game in the Dominion by spearheading the design of courts and establishing clubs, Hellmuth was also an outstanding player,” (Peter Ustinov, Advantage Canada).