Leinster kept their Champions Cup quarter - final hopes alive with a nail - biting 14 - 13 win over Conor O'Shea's side .
Ruddock will now miss the province 's festive PRO12 interprovincial games and is a major doubt for the last two rounds of European competition .
Leinster kept their Champions Cup quarter - final hopes alive with a nail - biting 14 - 13 win over Conor O'Shea's side , but Ruddock will now miss the province 's festive PRO12 interprovincial games and is a major doubt for the last two rounds of European competition .