3️⃣ Novak *Djokovic retired injured after losing a gruelling first set of his Australian Open semi-final* to Alexander Zverev, leaving his bid for a record 25th Grand Slam crown in tatters. 🇦🇺 🎾 🇷🇸 The *37-year-old Serbian great's upper left leg was heavily taped* after he hurt it in the quarter-finals and he called time after going down 7-6 (7/5) to the German. *Djokovic left the court to a mixture of boos and applause from the crowd* as Zverev reached his first Melbourne final. It means *Djokovic has now gone five Grand Slams without winning the title he needs* to surpass Margaret Court's 24 and become the all-time leader. *Djokovic later said there is a chance he may have played his last Australian Open:* _"I want to keep going. But whether I'm going to have a revised schedule or not for the next year, I'm not sure."_