One of the country’s top sports science experts has warned there is a “great danger” rival counties will be unable to compete with Dublin in the years ahead unless they overhaul their development structures.

After playing a host of unknown faces during the O'Byrne Cup where they lost the final to Westmeath, Jim Gavin's line-up sees a number of familiar names return to the fold.

Con O’Callaghan knows what he’s missing. That doesn’t soften the blow but spreading himself thin or leaving Jim Gavin is not on the agenda.