New Zealand captain Ross Taylor and batsman Andrew Ellis have undergone hospital treatment after showing signs of stomach flu and dehydration in Sri Lanka.
Ellis was forced to return to the team hotel during Sunday's second one-day international in Pallekele, but Taylor's symptoms were less severe and he played on.
The duo were showing signs of dehydration on Monday and officials decided that Taylor and Ellis should be taken to hospital for further medical care.
"Andy (Ellis) started to feel a bit crook as soon as he got out there in the heat," said New Zealand coach Mike Hesson.
"We suppose he's eaten something that hasn't agreed with him. He was pretty sick between innings.
"He went out there at the start of our fielding innings and thought he'd give it a go, but pretty quickly he took a turn for the worse and we sent him straight back to the hotel.
"Ross stuck in there well. He was clearly unwell having eaten something or caught a bug somewhere. He hung in there and played a brilliant innings."
Taylor hit 72 runs for the tourists, while Ellis managed just four as Sri Lanka won the rain-affected match by 14 runs on the Duckworth Lewis method.
Sri Lanka now lead the series 2-0 ahead of Tuesday's third ODI.