Kerr has pleaded not guilty to a charge of racially aggravated harassment, causing alarm or distress to a police officer during an incident in Twickenham, south-west London, in January last year.
"The first thing I want to say is that Sam has our full support. She knows that," said Hayes, talking in public for the first time about her 30-year-old star player at a news conference in London on Wednesday.
