Eoin Morgan led a fresh-faced England side to victory over his native Ireland but hailed the old man of the team for setting up the result.
At 30, Jonathan Trott was comfortably the elder statesman of a side that included three debutants and three more players with 11 caps between them.
The fit-again Warwickshire batsman produced a typically stoic innings at the top of the order, top-scoring with 69 in 105 balls and sharing in only century stand of the match alongside Morgan.
England's 201-8 was enough to see to an 11-run win after Ireland fell short of their rain-revised Duckworth-Lewis target of 129.
Trott's reluctance to up the ante after passing 50 will provide critics of his languid style with more fuel, but with new boys James Taylor and Ben Stokes failing and wickets tumbling thereafter, Morgan was delighted to have Trott's experience at the crease.
"It was a challenging day for us. Going on and off for the rain wasn't easy and batting first wasn't easy," said Morgan, captaining his adopted country for
the first time in his home city.
"It was hard to say what was a good score on that wicket, so we're very happy with the result.
"Trotty is invaluable to our team and has been for a couple of years, since he has been involved.
"Today he was crucial to our success and the majority of times he scores runs we win, which is fantastic.
"He judges the wicket really well and we take great advice from him."
Morgan, who made 59 against his former team-mates, was also impressed with Jade Dernbach.
The Surrey seamer continued his form from the Sri Lanka one-day series to claim three wickets, including danger man Kevin O'Brien.
"Jade bowled extremely well," said Morgan. "The wicket was difficult and it was really hard to read the slower ball. It was quite dry underneath and a bit patchy so going from 85mph to a slower ball was really hard to pick up. It's a hell of a skill and Jade has it.
"He stepped up in the last series too, especially at Old Trafford when he finished the game off. We haven't had someone like that for a long time and he certainly fits the bill."
Ireland captain William Porterfield refused to blame the weather for his side's defeat.
The recalculations ultimately left them chasing 87 off 60 balls following a stoppage which interrupted their innings.
He said: "It's swings and roundabouts. It probably worked for us a bit, worked for them a bit throughout the day.
"We thought maybe 87 was a bit much slightly at the end there off the 10 overs but that's the way it goes."
He added: "It was a bit frustrating coming on and off for rain. Bit disappointing in the end. We gave it a crack, that's all we could do.
"At half-time were were pretty happy but unfortunately the rain came again."