
After winning at least one major every year from 2003 to 2010, Federer's trajectory began to plateau in 2011, the year Djokovic took his game to new heights.
Another Wimbledon title followed for Federer in 2012 - but then, thanks to a combination of his rivals' brilliance and injuries, the Swiss did not win another major for four years.
Most wrote him off as Nadal and Djokovic closed in on his tally, before Federer's renaissance in 2017 - when his rivals stumbled because of injury and loss of form - kept him at least three titles ahead.
That was until 2019, when Nadal and Djokovic shared the four majors equally, leaving the trio closer than ever.
Then Federer had company - for the first time since he was briefly level with Sampras in 2009 - after Nadal's win at Roland Garros in 2020.
Djokovic pulled level on 20 after winning the Australian Open, French Open and Wimbledon titles in 2021.
But he missed the opportunity to win again at Melbourne Park in 2022 when he was deported from Australia in a visa row connected to him not being vaccinated for Covid-19.
That allowed Nadal to take the outright lead for the first time, moving two clear when he won a record 14th Roland Garros title last year.
However, Djokovic won Wimbledon last year and has added the Australian Open and French Open titles this year to take sole leadership for the first time.
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