Felipe Contepomi and Ronan O'Gara were bitter foes as players and, by coincidence, the latter will sign off with Leinster in Europe against his old rival in the upcoming Champions Cup final.
Contepomi, 44, will reunite with his former Leinster head coach Michael Cheika in the summer as together they will look to revive Argentina's fortunes.
For now, though, the cultured former out-half, centre and full-back is focused on the end game of his final campaign as Leinster backs coach, a role he took on ahead of the 2018-19 season.