The 2003 Canada Masters and the Rogers AT&T Cup were tennis tournaments played on outdoor hard courts.

1, Australian Open and Miami champion Andre Agassi, French Open and Monte Carlo winner Juan Carlos Ferrero and Wimbledon champion Roger Federer.

Other top seeds competing were recent Umag winner Carlos Moyá, Indian Wells champion Lleyton Hewitt, Andy Roddick, Guillermo Coria and Rainer Schüttler.

1, French Open, Indian Wells, Rome and recent Los Angeles champion Kim Clijsters, Charleston and Berlin winner Justine Henin-Hardenne and Warsaw champion Amélie Mauresmo.

Among other seeds were Australian Open quarterfinalist Daniela Hantuchová, Doha champion Anastasia Myskina, Magdalena Maleeva, Amanda Coetzer and Jelena Dokić.