Serena warns of more to come
January 21, 2012 11:53:16 UK
Serena Williams warned the rest of the women's draw that she has much to improve on after she booked a place in round four of the Australian Open.
Williams, a five-time winner in Melbourne, thrashed Greta Arn 6-1 6-1 to set up a last-16 clash with Ekaterina Makarova, who upset Vera Zvonareva and the American is 1.001 to win a sixth Australian crown.
"I'm nowhere near where I want to be, but I'm trying to play through it," Williams said after her latest win. "I'm really rusty. I'm just trying to play through the rust."

I'm nowhere near where I want to be, but I'm trying to play through it.
Serena Williams
Petra Kvitova enjoyed an easy ride into round four when opponent Maria Kirilenko was forced to retire early in the second set of their match due to a thigh injury, with the Wimbledon champion 2.75 to win a second Grand Slam in Melbourne.
The Czech will take on former world number one Ana Ivanovic in the last 16, with Kvitova 1.30 to secure a quarter-final spot.
Fourth seed Maria Sharapova also had few problems as she dispatched Angelique Kerber 6-1 6-2 and the 2008 champion will face another German in the last 16, as she comes face-to-face with Sabine Lisicki.
Lisicki won the meeting of the pair at last year's Wimbledon, but Sharapova is 1.33 to exact revenge this time around, with Lisicki 3.40.
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