Human rights activist Drew Pavlou, who is behind the 'Where is Peng Shuai?' campaign, welcomed Tennis Australia’s "capitulation" after its chief Craig Tiley said fans could wear t-shirts with the question emblazoned on them at the Australian Open.

The about-turn followed video emerging on Sunday of security staff ordering spectators to remove shirts and a banner in support of the Chinese player at Melbourne Park.

“Hopefully people in China, in mainland China, will see thousands of people wearing those Peng Shuai t-shirts at the Australian Open grand final and they will know that she is still not safe,” Pavlou said.