Johnny Sexton will be assessed for a hip flexor injury following Leinster's big win over the Scarlets.

The Ireland out-half was withdrawn with half an hour remaining at the RDS.

Just prior to that the Leinster captain, who had taken all the goal kicks to that point, declined a conversion, handing the duties to Ciaran Frawley.

Ireland lock James Ryan was also taken off for a head injury assessment late in the match.

Leo Cullen’s side racked up seven tries and 50 points against a poor Scarlets side, who for the second weekend in a row suffered a heavy defeat at the hands of an Irish province.

Sexton was all smiles at the end of the game

"Johnny has his hip flexor thing," Cullen told RTÉ Sport.

"He was happy in the dressing room, 'happier' than when [he left], he’s hopefully OK. Again, we’ll get him assessed."

Frawley, named man of the match, passed a head injury assessment following a clash of heads with Scarlets scrum-half Gareth Davies.

"The rest of the guys are OK, a few bangs and bumps, overall we’re OK," added the head coach.

"Ciaran went off for a HIA during the course of the game so he was OK to come back on.

"James had a HIA as well so he’ll go through the return-to-play. He was gone off on 67 or 68 minutes."

There is just one remaining round of the United Rugby Championship before Ireland host Japan, New Zealand and Argentina in the autumn international window.

Caelan Doris scored Leinster's fourth

The win was Leinster's fourth on the trot as they bid for a five-in-a row.

"It’s not perfect by any stretch of the imagination," added Cullen, whose side had a bonus point in the bag by the 46th minute.

"We knew Scarlets would come very aggressively at us, that they were well fired up.

"They stretched up defensively, especially in the first half. Johnny McNicholl is one of the most dangerous attackers in our league over the last few years and they caused us problems on the edge.

"Overall, we are pleased. There is plenty to get better on. Recovery is the theme for now.

"We know it’s going to be tight over the course of the season because of fewer games.

"We talked about this five-game block and trying to squeeze every last point out of it.

"There are so many other variables over the course of the season.

"We’ve played three home games so it’s important to go away next week and prepare well."

Ronán Kelleher makes a run

Starting hooker Ronán Kelleher got the hosts’ first try, while his replacement, Dan Sheehan, crossed twice at the end to wrap up the result.

Touchdowns from Andrew Porter, Caelan Doris and Cian Healy, and a penalty try made up the rest of the list.

"Our forwards started to get more control as the game went on," said Cullen, who brings his team to Glasgow next Friday with 19 points out of a possible 20.

"Dan was very dynamic, I thought Ronan did well as well, hookers scoring tries, which is great.

"I notice some of them are hanging at the back of the mauls but they are both good dynamic players for us so yeah, positive steps for the two of them."