And what bigger incentive could there be for both men to try to end their careers with a win in the city they graced for so many years, Dublin. The Amlin Challenge Cup Final takes place at the RDS on Friday, 17 May.
Stade Francais travel to Bath on Saturday, 6 April (kick-off 13.00) to try to stay on course for a third successive Amlin Challenge Cup semi-final. Leinster, the reigning Heineken Cup champions, head to London Wasps on Friday, 5 April (kick-off 20.00) for their first game in the tournament.
Argentinean legend Contepomi made his European debut for Bristol way back in the 2000/01 season in the Challenge Cup. He led the side into the Heineken Cup in his third season in the West Country before switching to Leinster for the 2004/05 season.
He was top scorer for the Irish province in four of the five seasons and was cruelly robbed of a place in the 2009 Heineken Cup final by injury when Leinster went on to win the title for the first time. After that he moved to Toulon for two seasons and is currently in his second season at Stade Francais.
He has scored 636 points in total in both European tournaments and 58 appearances for his four clubs. His total of 444 points in 40 Heineken Cup games puts him eighth on the all-time list
While Contepomi is still hunting down his first European winners' medal, Nacewa will return to his native New Zealand in the summer with three Heineken Cup titles to his name. He was an ever present in the title winning seasons of 2011 and 2012, when Leinster emulated Leicester Tigers in successfully retaining the Heineken Cup, and made 38 appearances all tolled in the tournament.
He started with two defeats in his first season, away against Castres Olympique and London Wasps - Contepomi played alongside him in both fixtures - yet was still able to pick up his first medal as Leinster beat Tigers in the 2009 final at Murrayfield. Toulouse knocked-out the champions at the semi-final stages the next year before Leinster and Nacewa marched to their back-to-back triumphs at the Millennium Stadium and Twickenham.
With seven defeats and two draws in 38 Heineken Cup appearances his record ranks among the best in the tournament. Can he end on a high with an Amlin Challenge Cup Final appearance on his own ground, the RDS?