Luke McGrath's season could be over.
The Leinster and Ireland scrum-half limped off in the second-half of Leinster's 20-13 win over Scarlets on Saturday.
Leinster head coach Leo Cullen said he was unsure about the injury at his post-match press conference, however, the
Irish Times Gavin Cummiskey later reported that McGrath had suffered a knee injury but that an ACL tear had been ruled out at this stage.
https://twitter.com/Cumoski/status/964922402344927232
McGrath was an unused substitute in Ireland's opening round win over France earlier this month and he scored a brilliant try in the win over the Scarlets.
The 25-year-old had been enjoying the finest year of his career and his absence should create an opportunity for Connacht scrum-half Kieran Marmion to deputise behind incumbent Ireland scrum-half Conor Murray for the rest of the Six Nations.
Ulster scrum-half John Cooney will now likely come into the Ireland squad as McGrath's replacement having previously trained with the Ireland team during their pre-Six Nations camp in December.
