Nick Kyrgios said he is "thankful" to Andy Murray for looking out for him after he spotted signs of self-harm on the Australian's body.

Former tennis world number one Rafael Nadal will return at the Brisbane International warm up event for the Australian Open in January, the Spaniard said on Friday.

Italy's Davis Cup hero Jannik Sinner said it was a "special feeling" to end his team's 47-year drought in the competition on Sunday in Malaga.

Italy won the Davis Cup for the first time since 1976 as Jannik Sinner crushed Alex de Minaur 6-3, 6-0 to seal a 2-0 win over Australia on Sunday in Malaga.

Novak Djokovic said he accepts responsibility for Serbia's Davis Cup semi-final defeat by Italy on Saturday after failing to convert three match points against Jannik Sinner.

A "proud" Jannik Sinner beat world number one Novak Djokovic twice in one day to send Italy into the Davis Cup final with a 2-1 win over Serbia on Saturday in Malaga.

Novak Djokovic was furious after being asked to undergo a dope test shortly before Serbia's Davis Cup win over Great Britain, although the International Tennis Integrity Agency (ITIA) said Saturday it was standard practice and he had not been singled out.

Alex de Minaur guided Australia into a second successive Davis Cup final with an assured 2-0 win over Finland on Friday in Malaga.

Djokovic was enraged as some fans tried to drown out his victory speech with drums, which the superstar said he felt he had to respond to.

Serbia are one of the eight surviving nations from September's group phase and will face Britain on Thursday.

At 36 years old Djokovic is still tennis' number one player by some distance and he has racked up a host of new records this season, taking his Grand Slam tally to 24 and finishing top of the year-end world rankings for the eighth time.

Novak Djokovic closed in on a record-breaking seventh ATP Finals title on Saturday after sweeping past Carlos Alcaraz 6-3, 6-2 in a dominating semi-final display he hailed as his best of the tournament.

Carlos Alcaraz is dreaming of victory at the ATP Finals after setting up a semi-final showdown with Novak Djokovic with Friday's 6-4, 6-4 win over Daniil Medvedev.

World number one Novak Djokovic beat ATP Finals alternate Hubert Hurkacz 7-6(1) 4-6 6-1 in their Green Group clash on Thursday and advanced to the semi-finals after Jannik Sinner edged Holger Rune 6-2 5-7 6-4 in the evening match.

Russian Zverev put on a powerful display to see off world number two.

The 24-time Grand Slam champion needed just one win or a defeat for young rival Carlos Alcaraz in order to secure top spot in the ATP rankings for 2023 and prevailed in a three-hour Green Group clash with spirited debutant Rune.

The 36-year-old Djokovic eclipsed his previous record set two years ago as the tournament's oldest champion, capturing his 40th Masters 1000 title and stretching his winning run to 18 matches.

Novak Djokovic rallied to defeat Andrey Rublev 5-7, 7-6 (7/3), 7-5 in a gripping Paris Masters semi-final on Saturday, earning a shot at a record-extending seventh title in the final against Grigor Dimitrov.

"It's very tough seeing children, babies dying every day," she said.

Djokovic will spearhead Serbia at the tournament from December 29-January 7 in Sydney and Perth as he builds towards the defence of his Australian Open title.