Novak Djokovic won the opening match of the Davis Cup for Serbia before Tomas Berdych restored parity for the Czech Republic.
Serbia's hopes of winning a second Davis Cup title have suffered a blow with second-ranked Janko Tipsarevic pulling out.
Tomas Berdych and Radek Stepanek will lead the Czech Republic when the title holders take on Serbia in the Davis Cup final.
Stanislas Wawrinka beat Feliciano Lopez 6-3 3-6 6-3 at the Paris Masters to end Nicolas Almagro's World Tour Finals chances.
Roger Federer confirmed his spot at the end of season ATP Tour finals by reaching the third round of the Paris Masters.
Marin Cilic won his first match since returning from a doping ban with a 5-7 6-1 6-4 success against Igor Sijsling in Paris.
ATP round-up: Jo-Wilfried Tsonga was upset in straight sets by world number 63 Robin Haase in the Erste Bank Open semi-finals.
ATP round-up: Jo-Wilfried Tsonga edged a gripping quarter-final against Dominic Thiem to reach the Erste Bank Open semis.
Novak Djokovic kicked off the defence of his China Open title with a ruthless 6-0 6-3 first round win over Lukas Rosol.
Rafa Nadal starts the final push to what he hopes will be a return to the top when he gets underway at the China Open.
Radek Stepanek faces Argentina's Juan Monaco in the opening singles of the Czech Republic's Davis Cup semi-final.
Tomas Berdych and Radek Stepanek will feature together in the Czech Davis Cup team for the first time this year.
Novak Djokovic of Serbia lived up to his top ranking by overwhelming Lithuanian Ricardas Berankis 6-1 6-2 6-2 at the US Open.
ATP World Tour Finals
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