| NBA – Championships – NBA Finals (NBA Finals) | 2020 | | 30 September–11 October |
| UCI World Tour – Gent-Welvegem | 2020 |  | 11 October |
| ATP Tour – Grand Slam – French Open | 2020 | | 27 September–11 October |
| World Rally Championship (WRC) – Rallies – Rally Italy (Sardegna) | 2020 | | 8–11 October |
| Southern hemisphere – Bledisloe Cup (Match 1) | 2020 | | 11 October |
| NBA – Championships – NBA Finals | 2020 | | 30 September–11 October |
| Others – Paris-Tours | 2020 | | 11 October |
| Formula 1 – Grand Prix – Eifel Grand Prix | 2020 | | 11 October |
| ATP Tour – Grand Slam – French Open (Final) | 2020 | | 11 October |
| WTA Tour – Grand Slam – French Open | 2020 | | 27 September–10 October |
| WTA Tour – Grand Slam – French Open (Final) | 2020 | | 10 October |
| MLB – Championships – World Series (AL Division Series #1) | 2020 | | 5–9 October |
| ATP Tour – Grand Slam – French Open (Semifinal #2) | 2020 | | 9 October |
| ATP Tour – Grand Slam – French Open (Semifinal #1) | 2020 | | 9 October |
| WTA Tour – Grand Slam – French Open (Semifinal #2) | 2020 | | 8 October |
| MLB – Championships – World Series (NL Division Series #1) | 2020 | | 6–8 October |
| MLB – Championships – World Series (AL Division Series #2) | 2020 | | 5–8 October |
| MLB – Championships – World Series (NL Division Series #2) | 2020 | | 6–8 October |
| WTA Tour – Grand Slam – French Open (Semifinal #1) | 2020 | | 8 October |
| ATP Tour – Grand Slam – French Open (Quarterfinal #4) | 2020 | | 7 October |
| ATP Tour – Grand Slam – French Open (Quarterfinal #1) | 2020 | | 7 October |
| ATP Tour – Grand Slam – French Open (Quarterfinal #2) | 2020 | | 7 October |
| NHL – Draft | 2020 | | 6–7 October |
| ATP Tour – Grand Slam – French Open (Quarterfinal #3) | 2020 | | 7–6(1) 5–7 6–7(8) 7–6(5) 6–2 | | |
| 7 October |
| WTA Tour – Grand Slam – French Open (Quarterfinal #4) | 2020 | | 6 October |
| WTA Tour – Grand Slam – French Open (Quarterfinal #1) | 2020 | | 6 October |
| WTA Tour – Grand Slam – French Open (Quarterfinal #3) | 2020 | | 6 October |
| WTA Tour – Grand Slam – French Open (Quarterfinal #2) | 2020 | | 6 October |
| UCI World Tour – Liège-Bastogne-Liège | 2020 | | 4 October |
| MLB – Championships – World Series (NL Wild Card Game) | 2020 | | 30 September–2 October |
| MLB – Championships – World Series (NL Wild Card Game) | 2020 | | 30 September–2 October |
| MLB – Championships – World Series (NL Wild Card Game) | 2020 | | 30 September–1 October |
| MLB – Championships – World Series (AL Wild Card Game) | 2020 | | 29 September–1 October |
| MLB – Championships – World Series (NL Wild Card Game) | 2020 | | 30 September–1 October |
| MLB – Championships – World Series (AL Wild Card Game) | 2020 | | 29–30 September |
| UCI World Tour – Flèche Wallonne | 2020 | | 30 September |
| MLB – Championships – World Series (AL Wild Card Game) | 2020 | | 29–30 September |
| MLB – Championships – World Series (AL Wild Card Game) | 2020 | | 29–30 September |
| NHL – Championships – Stanley Cup finals (Stanley Cup Finals) | 2020 | | 19–28 September |
| NHL – Championships – Stanley Cup finals | 2020 | | 19–28 September |
| Ultimate Fighting Championship – Men – Light-heavyweight | 2020 | | 27 September |
| World Championships – Men – Road race | 2020 | | 27 September |
| Ultimate Fighting Championship – Men – Middleweight | 2020 | | 27 September |
| Formula 1 – Grand Prix – Russian Grand Prix | 2020 | | 27 September |
| Honbasho – Aki Basho (September) | 2020 | | 13–27 September |
| NBA – Championships – NBA Finals (Eastern conf. final) | 2020 | | 15–27 September |
| ATP Tour – ATP Masters 500 – Hamburg | 2020 | | 20–27 September |
Past events
