Was Federer of the 2000s more dominant than Djokovic of the 2010s?

#5 Match win-loss record

Novak Djokovic

Roger Federer in the 2000s decade won 663 matches and lost 141, for a win-loss % of 82.4%.

Novak Djokovic in the 2010s decade suffered his 100th and final defeat against Federer in a group-stage match at the 2019 ATP Finals in London. Three wins later at the first-ever Davis Cup finals in Madrid, Djokovic closed the decade with a tally of 630 wins, for a win-loss % of 86.3% during the decade.

To put things in perspective, Rafael Nadal won 576 matches and lost 106 (84.5%) during the decade that was 2010-2019, which was marginally ahead of Federer's tally of 559 wins and 109 defeats (83.6%) during the same period.

Djokovic in the 2010s is a clear winner in this category.

WINNER: Djokovic of the 2000s

#6 Weeks at No. 1

Roger Federer

Federer has the most weeks (310) and most consecutive weeks (237) at the No. 1 spot in the ATP rankings.

During the 2000s decade, Federer occupied the numero uno spot for 237 consecutive weeks between 2004 and 2008, and in another spell (6th July 2009 to 6th June 2010) was the No. 1 ranked player for 26 more weeks. The Swiss maestro was ranked No. 1 for a total of 263 weeks during the 2000s decade.

Djokovic, in four different spells at No. 1, has occupied the top spot for 275 weeks during the 2010s decade, which makes him a winner in this category.

WINNER: Djokovic of the 2010s

CONCLUSION

Both Federer of the 2000s and Djokovic of the 2010s were supremely dominant performers during the respective decades. But the Serb topped four separate categories of performance analysis (out of six), and also had a marginally superior match-wins record.

Federer did have an easier time winning his matches in the 2000s, as 498 of his 663 triumphs came in straight sets (for a rate of 75%). By contrast, Djokovic won 458 out of his 630 matches in straight sets (72.7%). Dominance came more easily to Federer, as suggested by his ratio of straight sets wins, but in the big picture it was Djokovic who sustained his dominance to a greater degree.

OVERALL WINNER: Djokovic of the 2010s