Carter is playing his final European match for Racing before heading to Japanese club rugby, but Leinster fly-half Jonathan Sexton insists that even at 36 years old the World Cup victor remains a threat.
"It means a huge amount to me, my family and friends - they are the ones that all stood by me in my tough times after the World Cup", Lancaster said after helping Leinster to win Europe's premier club competition for the first time since 2012.
But Sexton responded with a penalty and Iribaren's fourth penalty was cancelled out by Nacewa's boot.
Their final hopes have been damaged by the loss of Maxime Machenaud after the France scrum-half was ruled out with ruptured ligaments in his knee.
Leinster survived a nail-biting conclusion to win the European Champions Cup for the fourth time, edging out Racing 92 15-12 yesterday in a dour battle at Bilbao's San Mames Stadium.
Carter is likely to start on the bench on Saturday, Springbok Pat Lambie having been given the nod for the No 10 shirt.
Bangabandhu-1 satellite on its way to orbit after launch into space
Though this was the first landing for a Block 5 first stage, it was the 25th overall for a Falcon 9 during an orbital launch. The Falcon Heavy successfully launched in February, and the Block 5 landed well today.
Cian Healy, Isa Nacewa, Johnny Sexton and Devin Toner can all equal the record of four European Cup winners' medals, which is jointly held by Cedric Heymans (Toulouse) and Frederic Michalak (Toulouse and Toulon).
The Springbok would not be able to return, meaning Racing had effectively lost two fly-halves before a point had been scored and thrusting Tales into the action.
Athlone's Robbie Henshaw lines out in the centre alongside Garry Ringrose.
The sides were level 6-6 at the break. He kicked two late penalties to give Leinster their first lead of the game when it mattered. Sexton suffered his second miss from long range, following a James Ryan lineout steal, and as the contest became increasingly scrappy, Iribaren's only penalty miss let Dan Leavy off the hook for a high tackle.
The successful kick set up an anxious closing minute, but despite working their way into drop-goal range, Tales hooked his effort wide of the left-hand upright and Leinster were champions again.