The San Francisco Chronicle, which also reviewed the report, said Hafnagel cut off contact with the reporter after she rejected his advance.
Hufnagel could not be reached for comment.
But on Twitter, he wrote: "Right now, the only focus should be on our basketball team! My time to exonerate myself of a fruitless claim by a reporter will come.... The sun is coming up! My heart is broken in a billion pieces, but I am not sick. Pray for those that do not have their health."
The action comes amid growing scrutiny over how the UC system deals with sexual harassment cases.
University of California President Janet Napolitano on Friday announced a new sexual harassment review process for administrative leaders amid furor over Berkeley's handling of misconduct claims involving its law school dean.
Napolitano also ordered new action against Berkeley law school Dean Sujit Choudhry, who resigned last week after his former administrative assistant filed a civil lawsuit against him and the UC regents. In the lawsuit, Tyann Sorrell alleged that UC officials mishandled her complaints that Choudhry subjected her to continuous unwanted kissing and touching over several months until March 2015.
The Choudhry case represents the latest allegation that UC officials failed to properly handle sexual harassment claims involving faculty. This month, students and faculty members urged UCLA to take stronger action against history professor Gabriel Piterberg over his alleged sexual harassment of two female graduate students. University officials imposed a $3,000 fine and Piterberg was suspended for one quarter without pay.
Last year, Berkeley administrators decided not to fire Geoff Marcy, a renowned astronomer found to have sexually harassed female students for years, prompting his colleagues to mount a successful campaign to force him out.
And Graham Fleming, UC Berkeley's vice chancellor for research, resigned last April after allegations arose that he sexually harassed a former campus employee. But he retained a position as an international ambassador for the school's planned Global Campus in Richmond -- an arrangement Napolitano nixed this week in ordering him immediately removed from that job and all other administrative responsibilities.
According to his biography, Hufnagel had worked at Berkeley for two years as an assistant coach.
"Hufnagel came to Cal prior to the 2014-15 campaign, following a season at