Washington (CNN) Special counsel Robert Mueller's team has made clear to Paul Manafort's attorneys that they believe the former Trump campaign chair is lying to them about President Donald Trump, according to the President's attorney Rudy Giuliani.

"In the questioning of Manafort, they did tell them at the time that they believed he was lying about certain things related to us that he's not lying about," Giuliani told CNN.

Giuliani said he is not sure this information will show up in the special counsel's Friday filing.

According to Giuliani, investigators told Manafort they don't believe that the President did not know about the 2016 Trump Tower meeting that Manafort attended with Donald Trump Jr., Jared Kushner and a Russian attorney who had promised dirt on Democratic presidential candidate Hillary Clinton.

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