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Daniel Wiffen missed out on a new world record, but did set a championship record in dominating the 1500m freestyle final at the Irish Open Swimming Championships at the National Aquatic Centre.

The double Olympic medallist won in a time of 14:42.71, more than half a minute ahead of his twin brother Nathan Wiffen (15:15.57) with Limerick's Denis O'Brien in third (15:22.18).

Wiffen publicly stated his aim was to break a world record at this year's Irish Open Championships, and admitted to RTÉ Sport that the 1500m was his best chance of doing so.

The record of 14:30.57 was set by American Bobby Finke in last year's Olympic final, a race where Wiffen took bronze - his second Olympic medal after claiming gold in the 800m freestyle.

Wiffen swam 14:39.63 in La Defense Arena back in August.

Olympic champion Daniel Wiffen may have missed the world record in the final of the men's 1500m at the Irish Open Swimming Championships but he did record the second fastest time in the world this year (14:42.71), finishing over 30 seconds ahead of brother Nathan in second place. pic.twitter.com/d7KCGa4dQo

Having already claimed the 400m and 800m titles earlier this week, the Armagh swimmer said he was 'disappointed' with his time in the 800m, which was three seconds outside his European and Olympic record, which he set when winning gold last summer.

Speaking to RTÉ Sport after his latest win, Wiffen said: "That was my favourite one so far and I actually felt that time was really good for now.

"I think my 800 should have been way faster, but I'm happy with the 1500.

"I've been pretty tired and yesterday the 400 kind of killed me off. I'm sure you saw me dying at the end of it. But I'm pretty happy with that."

Refusing to cite the lack of a rival to