There is very little separating Saturday’s Heineken Champions Cup finalists but Eddie O’Sullivan is wary of how Saracens have set out their stall.

The bookies are struggling to separate the sides as Leinster look to retain their trophy and stitch a fifth star to their shirt.

English champions Sarries, meanwhile, are looking to add to their 2016 and 2017 titles and are unbeaten this season in Europe.

The manner of their knock-out-phase wins over Glasgow and Munster was reminiscent of how Leisnter dealt with their quarter and semi-final opponents, Saracens and Scarlets, last season. 

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Leo Cullen’s side, on the other hand, struggled to get past Ulster and won’t take too much from their victory over Toulouse, with the nagging feeling that the French side didn’t play to their potential on the day.  

"My one concern for Leinster is that this is a bit of a mission for Saracens, they feel that this is their year to come back and make a statement," O’Sullivan told the RTÉ Rugby podcast. 

"I think the tactical battle will be phenomenal.

"They are two very similar teams in the way they play the game.

"They don’t play high-risk rugby in their own half, they are both capable of  taking you through 20 or 30 phases and punching you until you don’t know what’s going on.

"They’ll choke you out like a wrestling game.

"And they both have the capacity to open you up off set-pieces. They both score cracking tries off scrum and lineouts.

"If they both play to the peak of their ability I can probably see Saracens nicking it by one score but that just means that anything could happen."

Follow Leinster v Saracens (5pm) with our live blog on RTÉ.ie and the RTÉ News Now App or listen to live coverage on RTÉ Radio 1's Saturday Sport.