Police are investigating after a woman was indecently assaulted at the Australian Open yesterday.

A spokesperson for Victoria Police said the assault happened about 6:45pm yesterday. For reasons that aren’t entirely clear, this led police to close Olympic Boulevard near the Hisense Arena and Rod Laver Arena due to safety concerns.

“The prior and subsequent actions of the offender led to police conducting safety checks on Olympic Boulevard,” the spokesperson told Fairfax. “That concluded at 10:30pm with no issues found. The investigation into the assault continues.”

The closure caused “absolute mayhem” for spectators leaving the match between Nick Kyrgios and Andreas Seppi, with tennis fans told to expect delays.

The boulevard was reopened about an hour later. No arrests have been made.

Photo: Getty / Quinn Rooney.