All in all, it's been a pretty good week for Ross Tierney.

Undoubtedly disappointed not to be involved with Jim Crawford’s original Ireland U-21 training camp in Marbella, the midfielder maintained his impressive club form with a headed goal in Bohemians’ 3-0 victory over Waterford last Saturday.

Later that day, the 20-year-old was called up as a replacement for injured club-mate Dawson Devoy.

Today he came off the bench and within a minute he had marked his debut with a goal. Tierney, who had replaced Luca Connell with three minutes remaining, headed home fellow substitute Tyriek Wright's cross at the death to seal a 2-1 victory over Australia-U23's.

"Ross could have probably felt hard done by being left out of the initial squad, but he's come here and he didn't really train yesterday because he flew over," manager Jim Crawford said afterwards.

"But what an impact he made there. It's a goal he'll remember for the rest of his life. I'm delighted for him."

For Tierney himself, it showed how quickly things in football can change.

Ross Tierney, left, celebrates his goal with team-mate Joshua Kayode

"This time last week, I wasn’t even in the squad.

"Unfortunately, Dawson had to pull out injured. I got the call on Saturday after the game – I scored a header there too – so it was good to come on.

"The boys showed me what it’s like to come here and experienced lads like Conor [Coventry] and Gavin [Kilkenny] brought me under their wing. It’s been great."