A day after a report was published saying Ukrainian President Volodymyr Zelensky was upset that President Joe Biden will meet with Russian President Vladimir Putin before him, the White House announced Monday that Zelensky has been invited to Washington.

White House national security adviser Jake Sullivan told reporters that just before he entered the briefing room Monday, he was in the Oval Office with Biden, who was on the phone with Zelensky .

“This is a call that they had been planning to make in advance of President Biden going to Europe meeting with President Putin,” Sullivan said. “They had the opportunity to talk at some length about all of the issues in the U.S.-Ukraine relationship, and President Biden was able to tell President Zelensky that he will stand up firmly for Ukraine sovereignty, territorial integrity and its aspirations as we go forward. 

“And he also told President Zelensky that he looks forward to welcoming him to the White House here in Washington this summer after he returns from Europe,” Sullivan added.

In a statement released Monday night, White House press secretary Jen Psaki provided a statement about Biden's call with Zelensky earlier in the day, noting that the U.S. will send 900,000 COVID-19 vaccine doses to Ukraine.

"The leaders discussed our strategic partnership in support of President Zelenskyy’s plan to tackle corruption and implement a reform agenda, based on our shared democratic values and Ukraine’s Euro-Atlantic aspirations, that delivers justice, security, and prosperity to the people of Ukraine," Psaki said in a statement.

"President Biden affirmed the United States’ unwavering commitment to Ukraine’s sovereignty and territorial integrity in the face of ongoing Russian aggression in Donbas and Crimea," the statement continued. "The leaders also discussed the need for close cooperation on energy security and the fight against COVID-19, including U.S. plans to provide 900,000 vaccine doses to help Ukraine address the pandemic."

In an interview with Axios that was published Sunday, Zelensky said he only learned through the press that the U.S. would stop trying to block a Russia-to-Germany pipeline that the Ukrainian president says would allow Russia to circumvent and isolate Kyiv. The Biden administration has waives sanctions on the corporate entity and CEO overseeing the pipeline’s construction.

"This is a weapon, a real weapon ... in the hands of the Russian Federation," Zelensky said. "It is not very understandable ... that the bullets to this weapon can possibly be provided by such a great country as the United States."

In the interview, Zelensky called on Biden to meet with him face-to-face “at any moment and at any spot on the planet” before the Putin summit on June 16 in Geneva.