Sony Ericsson Open, Miami
25 March to 5 April
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Safina had reached two finals in four events this year ahead of Miami
Second seed Dinara Safina and seventh seed Ana Ivanovic both went out of the Sony Ericsson Open in Miami at the third round stage on Sunday.
Russia's Safina went down 6-1 6-4 to Australian Samantha Stosur, and Serbian Ivanovic lost 6-4 4-6 6-1 to Agnes Szavay of Hungary.
Top seed Serena Williams and her sister Venus enjoyed straightforward wins.
On the men's side, Roger Federer, Andy Roddick and Novak Djokovic all reached the last 16 with straight-sets wins.
comfortably saw off Frenchman Paul-Henri Mathieu 6-4 6-1 to set up a meeting with Tomas Berdych from the Czech Republic, who beat American James Blake in three sets.
saved two set points as he beat Dmitry Tursunov 7-6 (11-9) 6-2, despite a fierce outburst after umpire Cedric Mourier refused to stop play as light rain fell and the American subsequently lost his serve, slamming his racquet to the ground twice in anger.
It just bad match for me, it was just a disaster match
"I basically was wondering how many more times we were going to play on a slippery court," said Roddick. "He said, 'Well, no one has fallen yet.' I said, 'Well, if that's a barometer, then we have a problem.'
"So I feel like my argument was just, but the way I went about it probably wasn't the best."
swept aside Kiefer 6-4 6-1, while
saw off Robert Kendrick 7-5 6-4.
And after his sister's earlier disappointment,
made it a bad day for the family when he let a double-break and two match points slip in the final set against Gael Monfils to lose 5-7 7-5 7-6 (7-3).
On a damp and windy day in Miami, a jaded
was no match for Stosur, the world number 42.
"It just bad match for me, it was just a disaster match," said the Russian.
"I started to play a little bit better at 6-1 3-0 but I had put the game in her hands and it was too late."
fared little better as she failed to build on her run to the final in Indian Wells last week, losing the final set comprehensively against Szavay.
"I hardly did anything well today," said Ivanovic. "I was trying to come in and I was volleying pretty well at times, but I was really disappointed. I couldn't really hold my serve."
Vera Zvonareva, conqueror of Ivanovic in Indian Wells, was another surprise loser as she went down 6-3 3-6 6-2 to China's
, seeking a record sixth Key Biscayne title, reached the round of 16 by beating Peng Shuai 7-5 6-2.
defeated Anna-Lena Groenefeld 7-5 6-3, while fourth seed
saw off 31st seed Carla Suarez Navarro 6-2 6-2.
In the doubles, Britain's
and Sweden's Simon Aspelin lost 6-1 7-6 (7-4) to Rik de Voest and Bobby Reynolds.
But there was better news for Murray's fellow Briton,
who teamed up with Australian Jordan Kerr to defeat Brazilians Marcelo Melo and Andre Sa 7-6 (7-5) 6-1.