World No.6 Novak Djokovic has withdrawn from Serbia's Davis Cup first-round qualifying clash against Denmark due to injury, the Serbian Tennis Federation (TSS) said.

Novak Djokovic has reacted to the crowd at the Australian Open booing after he decided to retire from his semifinal against Alexander Zverev. The Serbian tennis player, 37, had taken to the court with his left leg heavily taped following Tuesday’s injury.

Novak Djokovic has withdrawn from Serbia's Davis Cup squad after suffering a hamstring injury at the Australian Open.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.

Novak Djokovic has withdrawn from Serbia's Davis Cup tie against Denmark because of a hamstring injury. The 24-time Grand Slam champion was booed off court by some Australian Open fans last week when he retired with the issue after losing the first set of his semi-final against Alexander Zverev.

With Novak Djokovic's decision to withdraw, Serbia will be without its star player in the first-round qualifying tie, which will begin on January 31.

Novak Djokovic was forced to retire hurt from the Australian Open semifinals - and the Serbian may not be back in action until the French Open.

"There has been a growing suspicion around Novak, due to his expressions or histrionics, casting doubt on the authenticity of his injuries."

Rafael Nadal's uncle and former coach, Toni Nadal, has questioned the legitimacy of Novak Djokovic's thigh injury that forced him to retire during his Australian Open semi-final against Alexander Zverev.