The top four seeds in Nur-Sultan swing into action.
And in Metz, the two seeds with byes who have yet to play – No. 1 Hubert Hurkacz or Poland and No. 3 Gaël Monfils of France – also start their campaigns.
Location: Nur-Sultan, Kazakhstan
Category: ATP 250
Surface: Indoor Hard
Dates: Sept. 20 – 26, 2021
Prize money: $541,800
Draws: S28 – D16
Thursday, Sept. 23, 2021
Singles, second round
Romain Arneodo (MON) / Benjamin Bonzi (FRA) def.  Andrey Golubev / Aleksandr Nedovyesov (KAZ) 64 46 [10-7]
Ricardas Berankis (LTU) / Artem Sitak (NZL) def  Andre Goransson (SWE) / Andrea Vavassori (ITA) 75 36 [10-7]
Doubles, first round
Jonathan Erlich (ISR) / Andrei Vasilevski (BLR) def  Marcelo Demoliner / Rafael Matos (BRA) 61 16 [10-7]
Lloyd Glasspool (GBR) / Harri Heliovaara (FIN) def David Pel (NED) / Aisam-Ul-Haq Qureshi (PAK) 76 (4) 63