Stephen Kenny has stressed that Ireland cannot dwell upon Declan Rice and Jack Grealish switching allegiance to England, with the focus firmly on the future.
West Ham midfielder Rice and Aston Villa captain Grealish are in the England squad for Thursday's friendly against Ireland at Wembley.
Rice's time in the Irish set-up before making the switch included three senior appearances, and Grealish played up to Under-21 level.
Asked with regard to the pair if he ever found himself wondering what might have been, boss Kenny said: "Not really.
"I think obviously they are both very good players. I'm very happy with some of the players we have. We have a lot of talent coming through.
"I can't worry about other players that could have been part of the equation. We can't really dwell on that from our point of view. We have to look forward and see what players are coming through and what other players emerge."
Kenny was then asked if he had thought about what he could do to prevent similar scenarios arising down the line.
And he said: "Well, I think you can't make promises you can't fulfil. What we can do is try to make the environment at all ages, all levels, as professional as possible, make sure there's a clear pathway between the Under-15s and the senior international team."