| Clue | Source | Date |
|---|---|---|
| Generalized rivalry situation | Premier Sunday | 09 Apr 2023 |
| Generic confrontation | LA Times Daily | 12 Nov 2022 |
| Battle with clearly defined sides | New York Times | 14 Jul 2021 |
| Generic rivalry | New York Times | 29 Aug 2020 |
| *Adversarial attitude | LA Times Daily | 23 Aug 2015 |
| *Adversarial attitude |