'Keane and Arter problems in the past'

The pair clashed after Keane criticised Arter's lack of availability to train due to an injury, but has now been recalled for the UEFA Nations League clashes with Denmark and Wales.

Speaking ahead of those games, O'Neill revealed that the pair had sat down together to clear the air, with any problems between them very much now water under the bridge.

"The two of them have been talking; they met up again last night. I probably believe it should make Harry stronger from it all," he revealed.

"I think if there is criticism is coming your, way take it in some sort of spirit and tend to prove someone wrong if the criticism is levelled at you and if someone is praising you, try and prove them right.

"So in this case, Harry wants to do that. I think he wants to do that, not just for Ireland, but I think he wants to prove Bournemouth were wrong to let him leave there at this minute, or certainly let him go out on loan.

"He has a bit to prove which is great. I think players should always have something to prove as should we as managers as well."

The Cardiff loanee was left out of the previous Ireland squad as a direct result of his problems with Keane, but O'Neill says the 28-year-old is now a big part of his plans going forward.

"Well he is one at the moment, even though his club team cannot get a result in the league, who is playing in the big league for a start," he added.

"And at the moment we don't have many players doing that. So it's good to put any sort of ranker behind now, I think that's what happened. It's nice to see him back."