Open Era Rankings on Twitter: "⚡️ TOP 20 List that includes only 2020 points (now available in the ATP Race option): https://t.co/AAj0dRlVM7" / Twitter
2020 ATP Tour - Wikipedia
Serbia Sets Spain Final | Day 9 Highlights | ATP CUP - YouTube
2020 ATP race to London – Updated standings
ATP Race to Turin update: Norrie climbs after first title
Record-Breaking Novak Djokovic Extends Big Titles Lead | ATP Tour | Tennis
Groups Are Set For 2020 Nitto ATP Finals | ATP Tour | Tennis
ATP Race to Turin | Tennisuptodate.com
ATP Finals - Wikipedia
ATP Race to Turin hots up in Seoul, Sofia and Tel Aviv
ATP Announces Four New Events For 2020 | ATP Tour | Tennis
2020 ATP race to London – Updated standings
Appendix A: Standard ATP weighting - Pew Research Center Methods | Pew Research Center
Diego Schwartzman Qualifies For First Time To Complete 2020 Nitto ATP Finals Singles Field | ATP Tour | Tennis
ATP Tour on Twitter: "✓@ATPCup 🏆 ✓@AustralianOpen 🏆 ✓Perfect 13-0 match record @DjokerNole has returned to No. 1 in the FedEx ATP Rankings. https://t.co/nHQodfqoNC" / Twitter
Methodology | Pew Research Center
ATP Race to London: Novak Djokovic reigns ahead of Rafael Nadal. Roger Federer..