Naomi Osaka was ¡°confused¡± but apologetic after a testy exchange and icy handshake at the end of her second-round win over Sorana Cirstea at the Australian Open on Thursday.

The four-time major champion downed the experienced Romanian 6-3, 4-6, 6-2 in Melbourne to set up a clash with Australia¡¯s 168th-ranked Maddison Inglis.

But it was far from a vintage performance, with 41 unforced errors and the match ending with angry words at the net.