Leinster wary of rested Munster
Leinster host their provincial rivals in the PRO14 semi-finals at the RDS on Saturday.
Cullen's troops are now bidding to become the first club to achieve the double of European Cup and PRO14 titles in the same season.
The side, who secure their European Champions Cup with a hard-fought 15-12 win over Racing 92 last weekend, will now have to switch from celebration to work mode in just a few days.
Meanwhile, Munster have had a fortnight to prepare for their Pro14 clash after the playoff win over Edinburg – a factor which will play a vital role believes Leinster head coach Cullen.
"Munster, with the prep they’ll have had, they’ll have got the edge," said Cullen, the only player to have captained three winning sides, and now the only man to have won the European Cup both as a player and as a coach.
"They're up and running, thinking about Leinster and watching the game on Saturday, probably having a plan in place – 'If that was our plan against Leinster, what would it look like, etc," Cullen told irishmirror.
"[The off weekend] gives them a huge advantage," he added.
Despite Leinster's hectic schedule, Cullen revealed that getting them regroup mentally is one tough job especially with Munster lurking in the shadows.
"We'll try and get a team that is fresh and hungry to go out and do the business. It’s back at the RDS and the last time we played there we got beaten by Treviso. That's still fresh in the memory.
"Obviously we lost the semi-final at home last year against Scarlets. They are things we'll discuss this week.
"In many ways, it's a mental challenge than a physical one, because the guys got a good physical work-out on Saturday. It's just mentally can we get ourselves to a place where we need to go and take on Munster.
"I almost feel like naturally there’ll be hype on Leinster now and Munster are waiting in the background.
"I know what it's like being in that other team that's waiting in the background. That was the Leinster team when Munster were riding high and we were going into games where no-one gave us a chance,"