No changes in the top 10, as only Russians Daniil Medvedev and Karen Khachanov were in action in an actual tournament.
Medvedev continued his furious run from the North American hard-court summer right into the fall, as he wins in St. Petersburg.
He doesn’t move up in the rankings, but he puts more separation between himself at No. 4, and Dominic Thiem at No. 5.
Thiem, who won St. Petersburg last year but chose Laver Cup instead, drops 160 points.
Novak Djokovic was idle, but reports have him back on the practice court, three weeks after his shoulder let him down at the US Open.
Nadal, Federer, Thiem, Zverev and Tsitsipas played Laver Cup. No. 8 Kei Nishikori is still injured and will miss the Asian swing.
And Roberto Bautista Agut, at No. 10, spent the week as a sub in Geneva.
ON THE UPSWING
Borna Coric (CRO): No. 15 ============> No. 14 (The Croat is back on a winning track by making the final in Russia).
Félix Auger-Aliassime (CAN): No. 21 ============> No. 20 (Idle last week, the Canadian is back in the top 20 after Wawrinka drops 10 points below him. He’s the No. 2 seed in Chengdu this week, on a mission to win that first Tour title).
Andrey Rublev (RUS): No. 38 ============> No. 36 (Ran into the buzzsaw Medvedev in the St. Petersburg quarters).
Jo-Wilfried Tsonga (FRA): No. 61 ============> No. 39 (Tsonga is on a mission. Challenger last week. Title in Metz this week. And another Challenger next week).
— Jo-Wilfried Tsonga (@tsonga7) September 22, 2019
Aljaz Bedene (SLO): No. 76 ============> No. 64 (The Metz finalist makes a jump).
John Millman (AUS): No. 94 ============> No. 79 (Good ride on the Challenger circuit in Taipei, as he wins the title).
Grégoire Barrere (FRA): No. 98 ============> No. 89 (Another career high for the 25-year-old Frenchman, who reached the Metz quarterfinals).
Egor Gerasimov (BLR): No. 119 ============> No. 98 (Into the top 100 and a career high after qualifying and reaching the St. Petersburg semis. The 26-year-old has a special exempt into Chengdu this week).
Peter Polansky (CAN): No. 200 ============> No. 167 (After a season of backsliding, the 31-year-old Canadian gets back in the winner’s circle with a title at the Columbus Challenger).
Danilo Petrovic (SRB): No. 259 ============> No. 194 (The 6-foot-8 Serb, down as low as No. 338 in May, won the Sibiu Challenger, and jumps into the top 200 for the first time at age 27).
J.J. Wolf (USA): No. 285 ============> No. 247 (A career high for the 20-year-old after making the Columbus final. He was the No. 1 U.S. college player last spring, out of Ohio State, before turning pro this summer).
ON THE DOWNSWING
Stan Wawrinka (SUI): No. 19 ============> No. 21 (Wawrinka bypassed Laver Cup in his little part of the world to play St. Petersburg (yes, it was about the money). But he ended up pulling out of that as he needed more down time after the US Open).
Gilles Simon (FRA): No. 37 ============> No. 49 (Last year’s Metz champ loses in the second round).
Ricardas Berankis (LTU): No. 63 ============> No. 70 (He gets Shapovalov in Chengdu, after a long trip from St. Petersburg).
Martin Klizan (SVK): No. 90 ============> No. 121 (Last year’s finalist – he defeated Wawrinka and Shapovalov – lost in the first round in St. Petersburg).
Matthias Bachinger (GER): No. 126 ============> No. 182 (Ouch. The 32-year-old German went from the qualies to the final in Metz a year ago. Last week, he lost in the qualifying).
Michael Mmoh (USA): No. 168 ============> No. 208 (Injuries have kicked the 21-year-old’s behind this season, and he falls out of the top 200. A year ago, he had just jumped into the top 100 and a career high).
Duckhee Lee (KOR): No. 216 ============> No. 252 (The 21-year-old from Korea, who is deaf, reached No. 110 back in April, 2017. While he broke through to win his first career ATP Tour match last month in Winston-Salem (sacrificing the US Open qualies to do it), he drops after not defending his semifinal effort in Kaohsiung).