Iordache’s inexperienced team fell to a 13-4 defeat against Romania in Team GB’s first Olympic outing in the sport since Melbourne 1956.
And Iordache admitted Britain are on a steep learning curve as his side prepare to battle against the three medallists from Beijing 2008 – Serbia, USA and Hungary – who were all drawn in the same group.
“We need more time and games at this level,” said the Romanian after seeing his side outplayed by his more experienced countrymen.
“The Olympics are a great opportunity to show ourselves, but we need to focus on our team and not the other ones. We don’t even have to look at the scoreboard during the play.”
Two goals from Rob Parker, one from Jack Waller and a converted penalty from captain Craig Figes were not enough to pose a threat to the emphatic Romanians.
Team GB created a number of decent scoring opportunities but failed to capitalise as the Romanians, and the impressive Nicolae Diaconu, proved more clinical in front of goal.
“The Romanian players are much bigger and older, by three to four years, and that made the difference,” added Iordache, whose side fell to a 17-7 defeat against Romania in a pre-Olympic test.
This was seen as one of the side’s more winnable games as reigning champions Hungary lie in wait for the youthful British side.
And centre-back Parker bemoaned his side’s wastefulness in front of goal against the Romanians.
“We knew it was going to be hard; we knew we had to step up,” said the 24-year-old who plays for Spanish side CN Terrassa.
“We created a lot of chances, but the finishing just wasn't there.”
Parker was full of praise for the raucous crowd and hopes the British public will continue to support their water polo representatives.
“We were very pumped after the opening ceremony and the home crowd was fantastic,” he added. “We are still very positive as we still have four games to play.”