On Thursday in the Australian Open semifinals, Novak Djokovic and Roger Federer will be for the 45th time in their careers with their head-to-head record tied at 22 wins each. They played eight times last year—Djokovic won five of those matches, including both of their Grand Slam meetings, which Djokovic won in four sets. The last time Federer defeated Djokovic in a best of five-set match was in the 2012 Wimbledon semifinals. As the head to head record would suggest, there is very little that separates these two.
Let’s look back at their previous 44 matches. These matches have hinged on how well Federer served and how well Djokovic returned Federer’s serve. So here are some key Federer serving numbers from their head to head matches.
When Federer has defeated Djokovic:
• He’s averaged 78% first serve points won—his career ATP Tour average is 78%
• He’s averaged 58% second serve point won—his career ATP Tour average is 57%
• He’s lost serve 26 times in his 22 match wins
• He’s 16-0 versus Djokovic when holding serve or losing serve just once in the match
When Djokovic has defeated Federer:
• Federer has averaged 70% first serve points won
• Federer has averaged 46% second serve points won
• Federer has lost serve at least twice in every match
• Federer has never won more than 78% of his first serve points
• Federer has never won more than 57% of his 2nd serve points
Other fun facts about their head-to-head:
• Federer has not lost to Djokovic if he’s won 79% or more of his 1st serve points (9–0)
• Federer has not lost to Djokovic if he’s won 58% or more of his 2nd serve points (14–0)
• Federer has won only 2 times when he’s lost serve 3 or more times (2–20)
• Federer has lost only 2 times when he’s lost serve less than 3 times (20–2)
• Since 2012 Federer has lost every match where he’s lost serve 2 times or more (0–12)
• Federer has held all his service games 5 times in 44 matches
• He’s not faced a break point only twice in 44 matches
Check SI.com's Australian Open Daily Data Viz hub page throughout the whole tournament for the latest data-driven infographics and charts from IBM, the official technology partner for the Australian Open. IBM captures and analyzes the data that powers all of the Grand Slams, as well as the digital platforms that extend the experience to fans around the world.