Novak Djokovic has withdrawn from Serbia's Davis Cup squad after suffering a hamstring injury at the Australian Open. His absence is a major blow, but captain Viktor Troicki remains optimistic.

World number six Novak Djokovic has pulled out of Serbia's Davis Cup first-round qualifying tie due to injury, the country's tennis federation (TSS) said.

The defending champion moved into the quarterfinals at Melbourne Park on Monday by eliminating the 13th-seeded Rune 6-3, 3-6, 6-3, 6-2.

Novak Djokovic’s high-handed decision to boycott ... Playing Denmark’s Holger Rune, Djokovic seemed determined to misinterpret the Centre Court crowd’s light-hearted shouts of “Ruuuune ...

Australian broadcaster Tony Jones has apologized to Novak Djokovic for comments he ... second set of his fourth-round clash with Dane Holger Rune on a steamy afternoon at Rod Laver Arena.

MELBOURNE, AUSTRALIA - JANUARY 19: Novak Djokovic of Serbia speaks to ... while defending champion Sinner gets No. 13 Holger Rune on Monday.

MELBOURNE, Australia — First came the medical timeouts, one each for Jannik Sinner and Holger Rune with the temperature above 90 degrees Fahrenheit at the Australian Open. Then came the bizarre ...

In a scary warning for his rivals, the Italian world No.1 said he had room for improvement after his straight sets victory - 6-3, 7-6 (7-4), 6-3 - against German No.2 seed Alexander Zverev. He has now won three grand slam singles titles.

Novak Djokovic and Jannik Sinner both required medical attention in their most recent matches after struggling physically on court. Their timeouts threw off their opponents.

Follow the quarter-finals action live as Madison Keys does battle with Elina Svitolina, Iga Swiatek faces Emma Navarro and Ben Shelton plays Lorenzo Sonego.

The rivalry between Novak Djokovic and Carlos Alcaraz is now the greatest show in tennis and fans of the sport must be pinching themselves that the legend has hung around long enough to engage in another great conquest against a champion.

Follow live text and radio commentary featuring Aryna Sabalenka, Carlos Alcaraz and Novak Djokovic from the Australian Open quarter-finals.