West Indies batsmen John Campbell and Shai Hope shattered the record for the highest partnership for the opening wicket in one-day internationals with a stand of 365 against Ireland in Malahide.
Campbell made 179 and Hope 170 to help West Indies to 381-3 as Ireland captain William Porterfield's decision to field first after winning the toss backfired.
Hope was first to his century and Campbell quickly followed with his maiden ODI hundred, before the pair surpassed the previous opening partnership record of 304 set by Pakistan's Imam-ul-Haq and Fakhar Zaman against Zimbabwe in July last year.
They were both dismissed in the 48th over, with Campbell top-edging Barry McCarthy to mid-off while Hope found a fielder at deep square leg three balls later.
It was the first time both West Indies openers made centuries in the same game and they fell just seven runs short of the record ODI stand, held by compatriots Chris Gayle and Marlon Samuels against Zimbabwe in 2015.
After the match, Kevin O’Brien gave his assessment: "It wasn’t best day in the office. The difference between Friday’s match [against England] and today was that on Friday everything stuck which is great for us on the day, but today everything went just out of reach - they didn’t really give any chances.
"You’ve got to give them credit, they played very well, it was just unfortunate we didn’t turn up in the field and let them get in and get away."
"We were well placed at one stage to chase a total of 330, but perhaps the start we had losing early wickets made it difficult of course to chase 380."