Former Lions teammates in 2017, the duo is bracing for another showdown in the 2024 Six Nations.
Earlier this year, Peter O'Mahony added another Six Nations winners' medal to his collection and proudly roamed around Aviva Stadium, his daughter atop his shoulders, following a resounding 29-16 victory over England.
Post-game, amid Ireland's revelry for their championship, Triple Crown, and Six Nations triumph, ITV's cameras captured O'Mahony engaging in a heated exchange with England forward Kyle Sinckler.
In the fleeting camera pan, O'Mahony appeared to be attempting to calm the prop down before escalating the discussion.
As a British & Irish Lions teammate of Kyle Sinckler during the 2017 tour to New Zealand, O'Mahony, who captained the Lions in the First Test against the All Blacks, found himself at odds with Sinckler two years later in Dublin.
During England's dominant performance against Ireland, the pair exchanged words on the sideline following a Sinckler shove.
The exchange between them suggests that their rivalry hasn't been resolved, and it's quite possible that the pair could engage in another confrontation next year.
30 best rugby players in Britain ranked, Owen Farrell sixth
The series commenced with assessments in men's and women's football, followed by men's cricket. The subsequent focus shifted to men's rugby.
To qualify for the top 30, players must currently be engaged in domestic competitions in Britain.
Best 30 men's rugby players in Britain right now (via Telegraph)
30. Rory Darge - Glasgow
29, Juan Martín González - Saracens
28. Louis Rees-Zammit - Gloucester
They wrote: "Pace and finishing prowess cannot be questioned - the Welsh wing is world class in that regard - but he has probably reached a point whereby he needs to diversify a touch. Still lethal and world class in the wide channels."
27. Emiliano Boffelli - Edinburgh
26. Alex Goode - Saracens
25. Nick Tompkins - Saracens
24. André Esterhuizen - Harlequins
23. Iain Henderson - Ulster
22. Theo McFarland - Saracens
21. Tommy Reffell - Leicester
20. Anthony Watson - Leicester
19. Steven Kitshoff - Ulster
18. Ollie Lawrence - Bath
17. Marcus Smith - Harlequins
They wrote: "A supreme, generational talent who, of late, has looked in as good a nick as ever. Everyone is aware of what the Harlequin can offer – Smith is never far from a highlights reel – but now his goal must be replicating this form on a consistent basis. Should he achieve that, there could be a world beater in-waiting."
16. George Martin - Leicester
15. Duhan van der Merwe - Edinburgh
14. Mateo Carreras - Newcastle
13. Jac Morgan - Ospreys
12. Pierre Schoeman - Edinburgh
11. Freddie Steward - Leicester
10. Ben Earl - Saracens
9. Jasper Wiese - Leicester
8. Darcy Graham - Edinburgh
7. Finn Russell - Bath
They wrote: " On his day, Russell is the world’s best fly-half – do we see ‘his day’ enough, would be the only offering from the devil’s advocate. Regardless, Russell brings unbridled joy to the sport."
6. Owen Farrell - Saracens
5. Julián Montoya - Leicester
4. Maro Itoje - Saracens
3. George Ford - Sale
2. Handré Pollard - Leicester
1. Courtney Lawes - Northampton
They wrote: "Where once he was a one-dimensional enforcer, during the World Cup Lawes demonstrated an astuteness and maturity which had been seldom seen. The Saint won just as much ball on the floor as he did obliterate attackers in the tackle. A worthy No 1."