World number one Novak Djokovic of Serbia will play against the 41st ranked Canadian Vasek Pospisil at the opening match of a Davis Cup semi-final showdown on Friday in Belgrade.

Djokovic, who suffered his third loss in four consecutive trips to the US Open final against Spain's Rafael Nadal on Sunday, will try to get his team off to a good start, as Serbia eyes Davis Cup glory after victory in 2010 against France.

The trophy was a prelude to a magnificent 2011 season for the 26-year-old Serbian, which saw him win the US and Australian opens and Wimbledon.

The first match, starting at 1400 GMT, will be followed with by a rubber between Montenegro-born Canadian Milos Raonic, the world number 11, and the 23rd-ranked Janko Tipsarevic.

In the doubles on Saturday, Nenad Zimonjic and Ilija Bozoljac will face Pospisil and his team-mate Daniel Nestor.

Zimonjic plays against Nestor, his former partner with whom he won Wimbledon twice (2008 and 2009) and the 2010 French Open.

Djokovic and Raonic play each other on Sunday, while Tipsarevic and Pospisil will play the last match.

The tie is set to be played on an indoor clay court before a sell-out crowd of 15,000 at Belgrade Arena. The winner will advance to November's final against either Argentina or the Czech Republic.

Serbia will be without Viktor Troicki, who is serving an 18-month doping ban handed down by the International Tennis Federation (ITF).