A three time Heineken Cup winner with Leinster, Sexton averages 18 points from his three finals in 2009, 2011 and 2012. That big game temperament could be crucial in the battle of the two European champions from 2012 at the weekend.
Leinster warmed-up for the clash with the reigning Amlin Challenge Cup champions with a five-try, 41-22 win over Zebre in Italy to stay on course for a home Play-Off in the RaboDirect PRO12. Victory moved them into second place, three points behind Ulster Rugby.
Sexton converted all five tries and added two penalties before he was replaced in the 65th minute with the result in the bag. His return to full match fitness will give coach Joe Schmidt a real headache, given that his stand-in Ian Madigan has performed so well in his absence.
Biarritz didn't fare so well in the Top 14 over the weekend, going down to a 16-0 defeat at Bordeaux-Begles, but with Heineken Cup qualification hanging on a successful defence of their Amlin CC title they will arrive in the Irish capital looking to perform a similar away day demolition job as they did on Gloucester in the quarter-finals.
More than 17,000 tickets have been sold for the game at the RDS to date.