Frank Russell Dancevic (born September 26, 1984) is a Canadian professional tennis player. He first became the country's top singles player, according to ATP rankings, on February 10, 2003, as an eighteen-year old, and remained so from January 30, 2006 until June 20, 2010.
Dancevic returned to the circuit in June after an extended time off the tour due to a back ailment. Having dropped a lot of single ranking points recently, he is now only Canada No. 3 in singles.
The right-handed Dancevic turned pro in 2003 and reached his career high singles ranking in September 2007 at World No. 65. A native of Niagara Falls, Ontario, he is the highest ranked men's Canadian singles player since Daniel Nestor, who was ranked World No. 61 in September 1999. (The highest ranking ever achieved by a Canadian is World No. 41, by Greg Rusedski in June 1994.) It was Fred Niemeyer whom Dancevic overtook to become, in early 2006, Canada's top-ranked singles player.