TORONTO - It's a must-win situation for Frank Dancevic, Daniel Nestor, Vasek Pospisil and Milos Raonic in a Davis Cup World Group play-off tie between Canada and Colombia in Halifax next week.

Martin Laurendeau captains the team and announced the makeup today and Canada enters as the favourite, ranked eighth in the world to Columbia's 26th.

Jesse Levine, Adil Shamasdin and Brayden Schnur also are travelling to Halifax as part of an extended squad of players for Canada.

The Colombian Tennis Federation is sending Santiago Giraldo, Alejandro Falla and doubles pair Juan Sebastian Cabal and Robert Farah.

Raonic went 5-1 in Davis Cup action last year to help lead Canada to the semifinals and at No. 6 is the highest-ranked Canadian singles player of all time.

Canada started the season in the World Group for the third consecutive year, playing their first-round tie on the road in February against Japan in Tokyo, but injuries to Raonic and Pospisil contributed to a disappointing 4-1 loss, forcing this match starting next Friday to stay in the World Group.