Third Serve
Talk Tennis Guru
UTS difficulty ratings are a bit of a meme. They’re based on opponent Elo which is notoriously bad at comparing relative levels across time because of its tendency to inflate over time and because it’s slow to adjust… and we’re dealing with a sport in which player form fluctuates pretty quickly… hence the existence and prevalence of upsets.Then what does? By a significant margin, Djokovic also has the better winning percentage, 91.3%, at the AO than Federer's 88.2% at Wimbledon. A 3% difference is big. If Djokovic went 0-3 at the AO from here on out, he'd still have the higher winning percentage. Djokovic is 4-1 against Federer at the AO and Federer is 1-3 against Djokovic at Wimbledon.
If this thread is to point out that Djokovic at the AO is less impressive than Nadal at RG, yeah, that's obvious. But if it's to point out that Djokovic at the AO is less impressive than Federer at Wimbledon, no, by any objective measure, that's not true. Here is Ultimate Tennis Statistics's level of difficulty of all the AOs won by Djokovic and all the Wimbledons won by Federer taking into account all 7 players they matched up against in each. Djokovic's toughest 7 AO wins are all more difficult than all but Federer's 2012 Wimbledon win. Overall level of difficulty is not even close. Djokovic had it harder and still won 2 more than Fed.
Year Slam Winner Difficulty 2016 Australian Open Novak Djokovic 1.170 2013 Australian Open Novak Djokovic 1.158 2012 Australian Open Novak Djokovic 1.149 2012 Wimbledon Roger Federer 1.144 2011 Australian Open Novak Djokovic 1.140 2008 Australian Open Novak Djokovic 1.116 2019 Australian Open Novak Djokovic 1.109 2015 Australian Open Novak Djokovic 1.080 2006 Wimbledon Roger Federer 1.078 2020 Australian Open Novak Djokovic 1.071 2005 Wimbledon Roger Federer 1.055 2017 Wimbledon Roger Federer 1.045 2021 Australian Open Novak Djokovic 1.023 2009 Wimbledon Roger Federer 1.023 2007 Wimbledon Roger Federer 1.020 2004 Wimbledon Roger Federer 0.962 2023 Australian Open Novak Djokovic 0.947 2003 Wimbledon Roger Federer 0.861
Elo is better suited to examining and comparing recent levels of players (i.e. how has Sinner been doing lately compared to Alcaraz?).