Ireland centre Robbie Henshaw will be available to make his seasonal debut when Leinster host the Lions at Aviva Stadium on Saturday.
The United Rugby Championship fixtures this weekend are the last provincial action before Ireland host New Zealand on 8 November.
Henshaw has not played since Ireland beat South Africa in Durban last July with what was described as a “minor injury”.
Fly-half Ciaran Frawley, who delivered the winning drop goal in that game, sustained an ankle injury during Leinster’s win over Connacht on Saturday.
His province have, however, described the knock as “not serious”, although it will be further assessed this week with a view to whether he can feature at the Aviva on Saturday.
Connacht’s Mack Hansen missed the same interprovincial derby with a hip injury sustained against Ulster this month but the 26-year-old is expected to train this week.
The winger missed both the Six Nations and Ireland’s tour of South Africa so has not played for the national side since the World Cup quarter-final defeat to New Zealand over a year ago.
Andy Farrell will name his Ireland squad for November on Wednesday. His side will travel to Portugal for warm weather training before their autumn fixtures against the All Blacks, Argentina, Fiji and Australia.