Russia's Karen Khachanov serves a ball during a Davis Cup Finals the quarter final tennis match against Serbia's Novak Djokovic, in Madrid, Spain. 22.11.2019#6083157
Serbia's Novak Djokovic serves a ball during a Davis Cup Finals the quarter final tennis match against Russia's Karen Khachanov, in Madrid, Spain. 22.11.2019#6083154
Serbia's Novak Djokovic returns a shot during a Davis Cup Finals the quarter final tennis match against Russia's Karen Khachanov, in Madrid, Spain. 22.11.2019#6083152
Serbia's Novak Djokovic returns a shot during a Davis Cup Finals the quarter final tennis match against Russia's Karen Khachanov, in Madrid, Spain. 22.11.2019#6083150
Russia's Andrey Rublev returns a shot during a Davis Cup Finals the quarter final tennis match against Serbia's Filip Krajinovic, in Madrid, Spain. 22.11.2019#6083142
Russia's Andrey Rublev returns a shot during a Davis Cup Finals the quarter final tennis match against Serbia's Filip Krajinovic, in Madrid, Spain. 22.11.2019#6083141
Russia's Karen Khachanov, right, and Serbia's Novak Djokovic, left, pose for a photo ahead of a Davis Cup Finals the quarter final tennis match, in Madrid, Spain. 22.11.2019#6083137
Russia's Andrey Rublev reacts after a Davis Cup Finals the quarter final tennis match against Serbia's Filip Krajinovic, in Madrid, Spain.22.11.2019#6083043
Russia's Andrey Rublev reacts after a Davis Cup Finals the quarter final tennis match against Serbia's Filip Krajinovic, in Madrid, Spain.22.11.2019#6083041
Russia's Andrey Rublev reacts after a Davis Cup Finals the quarter final tennis match against Serbia's Filip Krajinovic, in Madrid, Spain.22.11.2019#6083040
Serbia's Nenad Zimonjic reacts during a Davis Cup Finals the quarter final tennis match against Russia's Andrey Rublev, in Madrid, Spain.22.11.2019#6083037
Serbia's Filip Krajinovic returns a shot during a Davis Cup Finals the quarter final tennis match against Russia's Andrey Rublev, in Madrid, Spain.22.11.2019#6083036
Russia's Andrey Rublev returns a shot during a Davis Cup Finals the quarter final tennis match against Serbia's Filip Krajinovic, in Madrid, Spain.22.11.2019#6083035
Russia's Andrey Rublev returns a shot during a Davis Cup Finals the quarter final tennis match against Serbia's Filip Krajinovic, in Madrid, Spain.22.11.2019#6083034
Russia's Andrey Rublev returns a shot during a Davis Cup Finals the quarter final tennis match against Serbia's Filip Krajinovic, in Madrid, Spain.22.11.2019#6083033
Russia's Andrey Rublev returns a shot during a Davis Cup Finals the quarter final tennis match against Serbia's Filip Krajinovic, in Madrid, Spain.22.11.2019#6083012
Russia's Andrey Rublev returns a shot during a Davis Cup Finals the quarter final tennis match against Serbia's Filip Krajinovic, in Madrid, Spain.22.11.2019#6083010
Russia's Andrey Rublev returns a shot during a Davis Cup Finals the quarter final tennis match against Serbia's Filip Krajinovic, in Madrid, Spain.22.11.2019#6083007
Russia's Andrey Rublev reacts during a Davis Cup Finals the quarter final tennis match against Serbia's Filip Krajinovic, in Madrid, Spain.22.11.2019#6083005
Russia's Andrey Rublev returns a shot during a Davis Cup Finals the quarter final tennis match against Serbia's Filip Krajinovic, in Madrid, Spain.22.11.2019#6083003
Russia's and Serbia's players talk ahead of a Davis Cup Finals the quarter final tennis match, in Madrid, Spain.22.11.2019#6082999
Serbia's players pose before a Davis Cup Finals the quarter final tennis match against Russia, in Madrid, Spain.22.11.2019#6082994
Russia's players pose before a Davis Cup Finals the quarter final tennis match against Serbia, in Madrid, Spain.22.11.2019#6082991
Russia's Andrey Rublev, right, and Serbia's Filip Krajinovic, left, pose for a photo ahead of a Davis Cup Finals the quarter final tennis match, in Madrid, Spain.22.11.2019#6082986
Russia's Andrey Rublev serves a ball during a Davis Cup Finals the quarter final tennis match against Serbia's Filip Krajinovic, in Madrid, Spain.22.11.2019#6082984