In a joint interview with Reuters, the Associated Press and Agence France-Press, Zelenskiy said he received assurances that Biden would not use Ukraine as a bargaining tool in his meeting with Russian President Vladimir Putin this week.
He called on the United States to provide economic support to Ukraine and urged both Biden and the International Monetary Fund to be understanding of Ukraine's problems before placing "unfair" reform demands on his presidency.
"If we are talking about NATO and the MAP, I would really like to get (from Biden) specifics - yes or no," Zelenskiy said, referring to the Membership Action Plans given to candidate countries, which Ukraine has long sought. "We must get clear dates and the likelihood of this for Ukraine."
Zelenskiy was speaking on the same day as NATO members met for a one-day summit in Brussels. Ukraine has expressed disappointment in not being invited to the meeting.