Not surprisingly, Trani was delighted to see his side, who were beaten finalists in 2008, progress to the quarter-finals of the tournament's latest edition.
"It's indescribable really, but it's something that we are very proud of," Trani told the Asian Football Confederation's official website.
"You think about it before the game what if we win and how it would feel. For us it's just one of those journeys where we want to be part of a winning combination to reach heights that we can be proud of with our moments of winning tournaments.
"And in this particular tournament requiring high standards of performance, we have achieved that and we have got into the quarter-finals and we can enjoy this moment," he said, "We now have some time before we play the quarter-finals to prepare with the extra motivation through pre-season that there will be something to continue the success of this team.
Trani also singled out the club's defensive unit for praise, hailing it as the winning factor in the match.
"Eugene [Galekovic]'s performance was outstanding alongside two defenders in Nigel Boogaard and Jon McKain. With their ability to read the situation along with Eugene [Galekovic ] performing really well, it was obviously something that was a match-winning performance."
The draw for the AFC Champions League quarter-final stage will be held on 14 June.