Johnny Sexton has said that he will be fit for Ireland's Autumn Test against Australia in Dublin on Saturday.

"It's good to go. It feels good and I'm ready," said the Ireland fly-half, 37.

Ireland's number 10 resources are severely depleted with Joey Carbery, who started against Fiji, and Ciaran Frawley both ruled out.

Carbery is unavailable for Saturday's game after sustaining a head injury in last weekend's contest while Frawley will be sidelined for a number of months following knee surgery on Tuesday.

Sexton's Leinster team-mate Ross Byrne was called into the squad as cover on Tuesday with Munster's Jack Crowley the other fly-half option for Andy Farrell having made his debut off the bench against Fiji.

Despite his advancing years, Sexton's remains the orchestrator for the Irish and his availability is welcome news for the world's top-ranked team as they face an Australia smarting from last weekend's shock defeat in Italy.

The Ireland captain acknowledged that he had been concerned that he was in danger of missing this weekend's contest.

"A little bit. Last week was a bit of a struggle with swelling and fluid and stuff like that," Sexton told a news conference.

"It was just managing that and making sure I get the right amount of training in this week to be able to perform but also not do too much that swells it up again."

Sexton and Ireland team-mate Josh van der Flier are on the four-man shortlist for the World Player of the Year award and the veteran said that the recognition was "very special".

"It's always nice to be recognised like that, I'm not going to lie.

"[But] I would prefer a win and to play well on Saturday than win that, because ultimately at the end of the day it's opinion.

"Whereas what you produce on Saturday is what it is, what you see, and it's the only thing you can control. All my focus is on that and to be recognised is enough."