(Agencies)
Updated: 2008-03-30 14:44

| Switzerland's Roger Federer returns a shot to Gael Monfils of France during their match at the Sony Ericsson Open tennis tournament in Key Biscayne, Florida, March 29, 2008. [Agencies]

MIAMI, Fla. - World number one Roger Federer beat Frenchman Gael Monfils 6-3 6-4 in an entertaining second-round match at the Sony Ericsson Open on Saturday.

Women's seeds Ana Ivanovic and Jelena Jankovic also advanced but men's fifth seed David Ferrer and number 13 Andy Murray exited the tournament.

Top seed Federer, recuperating from glandular fever and without a title this year, surprisingly offered the world number 65 Monfils seven break-point chances, but never lost his serve.

"I tried to play in an aggressive way," Federer, who broke Monfils serve in the eighth game of the first set and the third game of the second set, told reporters.

"I couldn't really chip and charge the way I wanted to do because he's improved his second serve. I played well on the big points."

Spaniard Ferrer lost 6-4 7-5 to world number 60 Thomas Johansson of Sweden.

Ferrer, who has lost all three matches he has played against Johansson, reached the Miami semi-finals in 2005 and 2006.

Briton Murray, struggling with his serve throughout, wasted two match points before losing to Mario Ancic of Croatia 6-2 2-6 7-6.

Murray has won titles this year at Doha and Marseille but having just watched Ancic, serving at 4-6, save one match point with a winning forehand volley, Murray double-faulted away his second opportunity to close out the match.

"That was just a bad serve," Murray said. "It was the first time on tour that I've lost a match when I've had match points. So that's pretty disappointing."

American Andy Roddick also struggled to find his form but came through a tough 5-7 6-2 6-4 win over qualifier Viktor Troicki of Serbia.

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