Seven-time Australian Open champion Novak Djokovic is not known for his serve. But based on his performance so far this fortnight, perhaps the second seed should be.
The Serbian superstar has hit 47 aces in his first three matches of the tournament, the most he has struck in the first three rounds of any Grand Slam in his career. When he arrived in Melbourne, Djokovic had hit at least 14 aces in a match 33 times (not including Davis Cup), tallying a 29-4 record. He has now accomplished the feat three times (3-0), with a battle against Argentine Diego Schwartzman looming in the fourth round.