The National Bank Open is a prestigious tennis tournament held annually in Canada. It is part of the ATP Tour Masters 1000 for men and the WTA 1000 for women, attracting top players from around the world. The event alternates between two cities: Montreal and Toronto, showcasing both men's and women's competitions in different years. The tournament typically takes place in August and features a mix of singles and doubles matches. It serves as an important lead-up to the US Open, providing players with valuable experience on hard courts. The National Bank Open has a rich history and is known for its enthusiastic crowds and vibrant atmosphere.