The Official Online RBS 6 Nations Store is open. The store has everything you need to get behind your team during the RBS 6 Nations, plus the store is now fully stocked with a much wider range of rugby merchandise.
"Our discipline as poor in the early stages and that took the initiative away from us. We never really recovered.
"The penetration was not there and our decision-making was not up to scratch.
"The Heineken Cup is a tough competition and we are in a tough group. The reality is that if you don't perform, you don't make it."
Cheika refused to hide from the blame after his side's defeat.
He added: "It is my responsibility to make sure we play good football and that didn't happen.
"We did not win the key battles out there and I feel for our fans who made the journey to back us."
Felipe Contepomi converted Leinster's penalty try and also kicked a penalty.