Former South African international cricketer AB de Villiers in his tweet about Naomi Osaka's Australian Open win took a dig at Osaka's opponent from the US Open 2018, Serena Williams. "2 majors in a row! This time she's been "allowed" to enjoy the moment. Much deserved #OsakaKvitova #AustralianOpen," read De Villiers' tweet after Osaka's win.