On Friday, Roger Federer secured his return to No. 1 with a quarterfinal victory over Robin Haase in Rotterdam, saying that "maybe this one means the most to me."
The feat breaks several records. On Monday, the 36-year-old will become the sport's oldest-ever ATP No. 1, breaking Andre Agassi's record by more than three years. It will also be the longest span between the first and most recent appearance at No. 1 in ATP history at 14 years, 7 days, breaking current No. 1 Rafael Nadal's record of nine years and 184 days. It is also the longest span between appearances at No. 1 (5 years and 7 days since Federer's previous hold on No. 1).
In addition, Federer gets to extend his record of 302 total weeks at No. 1.
The 20-time Grand Slam champion was honored with a presentation on court in Rotterdam.