Rafael Nadal showed no signs of back trouble in a 6-3 7-5 first-round win over Daniel Gimeno-Traver in Rio de Janeiro.
Britain's Dan Evans was knocked out of the ATP Marseille Open by Ukraine's Sergiy Stakhovsky.
Round-up: Andy Murray eased into round two of the ABN Amro World Tennis Tournament after beating Edouard Roger-Vasselin 6-3 6-3.
British tennis's upturn in fortunes continued as Dan Evans made it into the second round of the Zagreb Indoors tournament.
Round-up: The Australian Open ended early for John Isner after the American number one retired from his match against Martin Klizan.
First round draw for the men's singles after qualifying at the Australian Open.
Agnieszka Radwanska's title defence at the Sydney International lasted just 92 minutes as she lost to Bethanie Mattek-Sands.
The father of Bernard Tomic may be banned from the Australian Open but it did not stop him cheering on his son in Sydney.
Lleyton Hewitt responded to the roars from the Pat Rafter Arena to oust sixth seed Feliciano Lopez 7-5 6-3 in Brisbane.
The message from Novak Djokovic could not have been more emphatic after the Serb retained his title at the ATP World Tour Finals with a crushing victory over Ra
Bob and Mike Bryan's incredible year ended in disappointment when they were beaten by Fernando Verdasco and David Marrero.
Stanislas Wawrinka beat Feliciano Lopez 6-3 3-6 6-3 at the Paris Masters to end Nicolas Almagro's World Tour Finals chances.
Stanislas Wawrinka remains on track for a spot in the ATP World Tour finals by seeing off Spain's Feliciano Lopez 6-3 3-6 6-3.
Roger Federer confirmed his spot at the end of season ATP Tour finals by reaching the third round of the Paris Masters.
ATP World Tour Finals
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