Novak Djokovic and Nikola Cacic lost a dramatic deciding tie-break in their doubles rubber as Serbia suffered a shock defeat by Germany in the Davis Cup Finals, while Daniil Medvedev helped the Russian Tennis Federation to an opening win. 

World No. 1 Djokovic had drawn Serbia level in their second group-stage tie by beating Jan-Lennard Struff after Filip Krajinovic’s loss to Dominik Koepfer. But the 20-time Grand Slam singles champion and Cacic slipped to a 7-6 (7/5), 3-6, 7-6 (7/5) defeat by Kevin Krawietz and Tim Puetz, who got over the line on their third match point in Innsbruck.