World number one Novak Djokovic needed just one hour to beat Denis Novak and help Serbia to a 3-0 win over Austria on the second day of the Davis Cup.
Djokovic breezed past Novak 6-3 6-2 to give Serbia an unassailable 2-0 lead in the three-match tie.
Dusan Lajovic had earlier started the Group F tie with a gritty 7-6 (7-5) 3-6 7-5 win over Gerald Melzer.
Nikola Cacic and Filip Krajinovic then beat Philipp Oswald and Oliver Marach 7-6 (7-4) 4-6 6-3 to wrap up the tie.
Defending champions Spain and Italy were also victorious on the second day of the competition.
Djokovic, who has not lost a Davis Cup singles rubber since 2011, was in imperious form against 110-ranked Novak.
He did not face a break point and dropped just six points on serve, racing through the second set in 28 minutes in Innsbruck.
"It feels great to play for Serbia again," Djokovic said.
"It has been a long year, but you always find extra motivation playing for your country."
Djokovic will likely be in action again on Saturday as Serbia face Germany, while US Open champion Daniil Medvedev will feature for the Russian Tennis Federation against Ecuador.
