Former No. 1 Caroline Wozniacki’s farewell to tennis — an exhibition match against good friend Serena Williams — is being postponed because of the coronavirus outbreak.

The last tournament of the 29-year-old Wozniacki’s professional career came in January at the Australian Open. The Dane won her Grand Slam title there in 2018.

She was supposed to face off against 23-time major champion Williams in Copenhagen on May 18 in a match dubbed “The Final One.”

Wozniacki wrote Tuesday on Twitter that their exhibition will be rescheduled because “the safety and health of everyone is most important.”