Sporting career
A sports lover, especially tennis, Janzé founded the Société sportive de l' Île de Puteaux in 1886, being then elected as its first president, and under his management, this society built the very first regular asphalt tennis courts in the Paris region, near the Pont de Neuilly, which was frequented by high society and Americans eager to play their favorite sport. This court was built on a piece of land that belonged to Baron Henri de Rothschild, who rented it to the Société de Puteaux until it became their property in 1895. By the end of that century, Société de Puteaux already had 13 courts and 1300 registered members, so they were chosen to organize and host the tennis events of the 1900 Olympic Games, which were contested by 73 players, including 15 women, who were the first female Olympians.
In July 1891, Janzé succeeded Georges de Saint-Clair as the new president of the USFSA, but he was then replaced just a few months later by Michel Gondinet, who himself also only lasted a year, as Janzé replaced him in 1892. In November of that year, the USFSA celebrated its 5th anniversary with a "sports festival" that included a conference in Sorbonne convened by Pierre Coubertin, who for the first time publicly proposed the revival of the Olympic Games; the USFSA president Janzé was present in this historic conference. In early 1893, he was replaced by Adolphe de Pallissaux, but he eventually returned to the presidency of the USFSA for a third time in 1894, and this time he held that position for four years, until 1898, when he was replaced by Paul Escudier. During this period, he was the president of the first Olympic Congress in 1894, which was organized by USFSA's secretary-general, Baron de Coubertin. He was also among the founding members of the French Olympic Committee in 1894, remaining as such for a full decade, until 1904.
In 1905, the French newspaper Les Sports modernes stated that "NO sporting venue is as elegant as the Puteaux tennis club", describing it as being "located in the center of a cheerful, green island, with very modern apartments for players, English-style sinks, cold and hot showers, lockers for rackets, costumes, and shoes, everything is designed for the perfect comfort of the members of the circle".
