Novak participated in the Kids' Day program on Saturday, playing an entertaining doubles match with several other players from Serbia, Croatia and Bosnia.
Serbia and Canada are tied in their Davis Cup semifinal tie after Day 1. Novak beat Pospisil 6-2, 6-0, 6-4, while Raonic prevailed over Tipsarevic in 5 sets.
Novak returns to the tennis court four days after the US Open final. The world no.1 takes centre stage in Friday’s opening singles rubber against Vasek Pospisil at 16.00 CET.