Pospisil on a fast court will give a good fight as well. Canada are the favourites imo.
Overall, I think Serbia will win it again, it looks like Djokovic is willing to play again this year and with Tipsarevic they have a very solid second player. Troicki as a reserve and Zimonjic for the doubles. Strong team.
"We get 20 seconds, Nadal gets 45!" - X-Man