[5] The International Lawn Tennis Federation (ILTF) was formed in 1913, and the CLTA was invited to be a founding member but declined.

[10] During the war, Canadian tournaments were suspended, except where "the entire proceeds were devoted to the Red Cross or other patriotic funds".

[5] Meldrum, who had previously been a founding member of the Ontario Lawn Tennis Association, boosted the international prestige of the Canadian Championships and began moving the tournament around Canada.

[16][17] In 1928, Meldrum proposed that one junior boy from each province be sent to the Canadian Championships as a means of stimulating improvement in their game.

[26] In 1976, the CLTA began renting a four-acre (1.6 ha) site on the grounds of York University in Toronto for one dollar per year, for the purpose of building a million-dollar five-court tennis centre, to be the home of the Canadian Open tournament.

Directors include Marc Bibeau, Jennifer Bishop, Jack Graham (emeritus), Richard Harris, Sébastien Leblanc, Stephen Mandel, Nadir Mohamed and Mike Tevlin.

Tennis Canada operates a junior national training program through three centers: at IGA Stadium in Montreal; at Aviva Centre in Toronto; and at the North Shore Winter Club in Vancouver.

The largest of these is the Grade 1 level Canadian Open Junior Tennis Championships held in Repentigny, Quebec.