Monica McLean has denied professor Christine Blasey Ford’s ex-boyfriend’s claim that she was coached by Blasey Ford, her friend, before she took a polygraph test years ago.

The ex-boyfriend’s claim (he has chosen to remain anonymous) was cited in Senate Judiciary Committee chairman Chuck Grassley’s (R-IA) Tuesday letter demanding more evidence from Blasey Ford’s lawyers.

“I have never had Christine Blasey Ford, or anybody else, prepare me, or provide any other type of assistance whatsoever in connection with any polygraph exam I have taken at anytime,” McLean said in a statement, according to the Wall Street Journal.

During her testimony before the committee, Blasey Ford said that she had never given anyone “tips” or “advice” on how to take a polygraph test.