Leinster Champions legacy
Leinster are not favourites but I'm quite sure that'll sit perfectly with Leo Cullen.
I think it's the final that everybody wanted. The top three teams in this tournament are Bordeaux-Begles, Toulouse and Leinster.
Bordeaux beat Toulouse in the quarter-final, which I'm sure Leinster were pretty pleased about but it's Bordeaux, they are the holders.
They have an incredible backline, probably the best half-back pairing in club rugby in [Maxime] Lucu and [Matthieu] Jalibert.
The incredible Louis Bielle-Biarrey on the wing, whose try-scoring feats are just off the charts.
So I think it's probably too simplistic to say it's their attack versus Leinster defence, but certainly that's going to have a huge role to play in it.
It really is a massive day for Harry Byrne.
There's been a seesaw battle at number 10 all season.
Byrne seems to have got that position over Sam Prendergast, who might not even make the bench at this stage.
The good news for Leinster is it appears as if Tommy O'Brien, who I think has been one of their most consistent players all season, there was a doubt about him. It seems as if he's going to be back in the side.
A lot of players coming back very timely. The likes of James Lowe featured last week against the Ospreys, but he might not even make the team.
Jamie Osborne was outstanding for Ireland at full-back in the Six Nations, but Hugo Keenan (below) is back and he is certain to start.
So they have an embarrassment of riches.
Everybody knows Leinster haven't played at their best.
They've yet to really deliver an 80-minute performance. Their whole season comes down to making this final. They've done that.
When you look at the personnel they have within their squad, I think it's their defining moment with Leinster.
They've won massive things with the British and Irish Lions, they've won with Ireland but for their legacy, the Champions Cup is what will define them as Leinster players.
And I just have this sneaking feeling, not defined by logic or anything else, that this may be Leinster's time.
The temperatures in Bilbao could be up anywhere between 28 and 30 degrees.
That mightn't suit them. I think it's going to be a one-score game, very little between them.
But I just think that Leinster, particularly up front, and it appears Paddy McCarthy might be back on the bench.
They have that brilliant back row of Jack Conan, Caelan Doris and Josh van der Flier.
That unit may prove the difference because if they can get on top, particularly in the breakdown, stifle the quick ball that Bordeaux play off, then Leinster might just sneak it.
It's going to be a fascinating contest.
Ulster's Top Challenge
[Having Robert Baloucoune back] is a huge boost.
He was outstanding for Ireland in the Six Nations. It's been a great season for Ulster under Richie Murphy. They have a good young side.
They play brilliant rugby but unfortunately, really due to a run of injuries, it's unravelled a little bit over the last month or so.
Losing Jacob Stockdale, Stuart McCloskey, who's been just named Ireland's Player of the Year, and then having their captain Iain Henderson suspended, is really untimely, especially against a team as powerful as Montpellier.
To put it in perspective, Montpellier are second in the Top 14 in France, which as we know is a massively competitive league, Bordeaux are in fifth place.
I just feel, unfortunately, Montpellier may just have too much power for this Ulster side.
Donal Lenihan was speaking on RTÉ Radio 1's Morning Ireland
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Listen to live commentary of the Champions Cup final on Saturday Sport on RTÉ Radio 1.
