Ireland and Leinster fly-half Johnny Sexton has been ruled out of this weekend’s game against Northampton Saints due to an injury sustained on Saturday.

The 34-year-old limped off early in the second half and will require further assessment on the knee problem.

He joins Joe Tomane, who will also miss the return fixture versus the Saints, on the sidelines. Tomane has re-aggravated his hamstring and will now be out of action for six to eight weeks.

Also ruled out of this weekend is Rory O’Loughlin, who will continue his rehab following a shoulder injury.

Due for further assessment this week is James Ryan, who was removed late in the second half against Northampton Saints with a head injury, and will follow the return to play protocols under the supervision of team medics.

However, in good news, hooker Seán Cronin has returned to full training following his neck injury.