Holders Czech Republic took a 2-1 lead over hosts Serbia in the Davis Cup team tennis final after Tomas Berdych and Radek Stepanek won their opening doubles match in Belgrade.
The Czechs are firmly in the driving seat after Berdych and Stepanek beat Nenad Zimonjic and Ilija Bozoljac 6-2 6-4 7-6.
Berdych now faces world number two Novak Djokovic in Monday's opening singles before Stepanek takes on Dusan Lajovic, a late replacement for the injured Janko Tipsarevic, or Bozoljac.
