The 2009 Canadian Open was a tennis tournament played on outdoor hard courts. It was the 120th edition of the Canada Masters for the men, and was part of the ATP World Tour Masters 1000 of the 2009 ATP World Tour, and of the Premier 5 of the 2009 WTA Tour. The men's event was held at the Uniprix Stadium in Montreal, Quebec, Canada, from August 8 through August 16, 2009, and the women's event was held at the Rexall Centre in Toronto, Ontario, Canada, from August 15 through August 23, 2009. It was the fourth event for both the men and women on the 2009 US Open Series.

Maria Yuryevna Sharapova is a Russian former world No. 1 tennis player. She competed on the WTA Tour from 2001 to 2020 and was ranked world No. 1 in singles by the Women's Tennis Association (WTA) for 21 weeks. She is one of ten women to achieve the career Grand Slam. She is also an Olympic medalist, having won silver in women's singles at the 2012 London Olympics. She has been considered as one of the best tennis competitors of her generation.