Mr Trump said last week that the nuclear disarmament summit would only be the start of a diplomatic process.
The logistics for the historic summit are "finalizing" with "significant progress" in preparatory talks, according to White House press secretary Sarah Sanders.
When it comes to paying for lodging at North Korea's preferred five-star luxury hotel, the United States is open to covering the costs, the two people said, but it's mindful that Pyongyang may view a USA payment as insulting. Most notably, the South Korean government paid US$2.6 million for the North Korean delegation's transportation, meals, and hotel bills at the Pyeongchang Olympics earlier this year.
There are also suggestions that the North Korean leader is acting out of concern that disgruntled military officers might attempt a coup when he travels to Singapore later this week for a summit with Donald Trump. The ex-Chicago Bulls and Los Angeles Lakers forward may even play a role in to play in the high stakes talks on North Korea's nuclear program, the New York Post reported.
Former US basketball player Dennis Rodman will reportedly be in Singapore when Donald Trump meets with North Korean leader Kim Jong-un next week.
Trump said he didn't want to use the term "maximum pressure" any more, because the two sides were "getting along".
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However, when the players came back on after a delay of nearly an hour Nadal immediately broke back to level the second set. In the other quarterfinal, Marin Cilic and Juan Martin del Potro were into the tiebreak and at 5-5.
The summit would represent the first ever meeting between a North Korean leader and a sitting U.S. president.
Trump finally confirmed the summit last week following a visit from a top Pyongyang official in Washington, after having abruptly cancelled the meeting as U.S. and North Korean officials traded verbal barbs.
Singapore authorities on Tuesday marked out a part of the island surrounding the Capella hotel as a special security zone for the days around the summit.
Ms Sanders called the letter that top North Korean official Kim Yong-chol delivered from Kim Jong-un to Mr Trump on Friday "interesting" but wouldn't comment on its contents.
There have been fears that tensions will burst over into full-out war between North Korea and its western allies.
The White House disclosed Monday the summit is to take place at 9 a.m.