Leinster head coach Leo Cullen says Johnny Sexton will have a scan on the facial injury he picked up in their BKT United Rugby Championship win against Connacht.
The Ireland captain suffered what looked like being a nasty cheekbone injury when he clashed heads with Jarrad Butler, after an upright tackle on the Connacht number 8 during the second half of the 41-12 win.
The out-half was withdrawn immediately from the game and was seen icing his cheek following the collision, and Cullen says he'll have an x-ray to determine the extent of the damage.
"Everyone can see he got a bang on the cheek, so he'll get an x-ray tomorrow, and we'll go from there," he said.
The injury comes just five weeks out from Ireland's Six Nations opener against Wales in Cardiff, but Cullen said it's too soon to determine the extent of the damage.
"We'll know by Tuesday, and what sort of course of action he'll have to take next."
The province ran in seven tries to maintain their 100% record in all competitions, pulling clear of Connacht in the second half after leading by just seven at the break.
And while the margin of victory was comfortable in the end, Cullen said they were made to work for it.
"A little bit rusty, it's fair to say. We had a different team, a new team come in with relatively short prep, and distractions so we're delighted to get a bonus-point win.
"Connacht didn't disappoint, they were very impressive in lots of facets of their game, we stuttered a bit in terms of trying to win quality lineout possession in the first half, which meant we didn't get a good launch into the game in stages, but when we did, I thought we looked dangerous. There was lots of positive attacking intent.
"We've plenty to work on as well, which we know at this stage of the season. We chop and change the team a bit because of the time of year, but overall we're pleased, and now we'll turn our attention."
For Connacht, it's back to back defeats in the Christmas Interpros, with Andy Friend's side now eight points adrift of the playoff spots in 13th place.
And just like his opposite number, the Connacht boss said he didn't believe the scoreline reflected the contest.
"I said to the boys that I don't think it's reflective of the game, but history books will tell us it's the scoreline," he said.
"I didn't think it was heads dropping. When you knock off against Leinster, it only needs one individual to knock off in a defensive line, and they'll flood through. Or one individual, instead of throwing a pass back, they throw it forward, and it's turnover and Leinster get a set-piece launch.
"I just think it was some individual error that opened a door for them."
