Serena Williams knocked out in fourth round of Australian Open

So who will win the Australian Open women’s singles now? A tweak in Serena Williams’ back - that her back-room team were quick to mention and which she preferred to play down - a couple of days ago may or may not have contributed to her static performance against Ana Ivanovic on Rod Laver Arena. The Serb’s 4-6, 6-3, 6-3 success has certainly placed the cat among the pigeons.

From their previous four meetings, Ivanovic had not taken a set and the highest number of games she could muster was four. My, how she turned that particular sequence around on a mild, satisfying day at Melbourne Park, playing strategically perfect tennis, moving Serena around, getting her angry and, most importantly, serving out as if she