Sony Ericsson Open, Miami
25 March to 5 April
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Federer has not won a Masters event since August 2007
World number Roger Federer cruised into the third round of the Sony Ericsson Open in Miami after brushing aside the challenge of qualifier Kevin Kim.
Federer, who is hoping to end a drought of 12 Masters events without a win, beat the American 6-3 6-2.
The 30-year-old Kim, ranked 107 in the world, had five break points, but was unable to convert any of them.
Third seed Novak Djokovic had an equally easy second-round win, beating Canadian Frank Dancevic 6-3 6-2.
"In most of my first-round games this year I haven't found the right rhythm but I was pretty happy with the way I started this tournament," said the Serb.
He's getting old and the young guys want to beat him. Eventually they will crack him down
continued his impressive season as he demolished Argentina's Diego Junqueira 6-1 6-1 in less than an hour and
beat Agustin Calleri by the same scoreline.
But former world number one Lleyton Hewitt crashed out in the second round, losing 6-1 6-2 to
, the seventh seed from France.
Federer was untroubled by Kim's game and quickly got the upper hand.
"I realised very quickly what his pattern was, especially on the serve," said Federer.
"He had a good few games but I think I did well. It was a great start to the tournament."
, the 22nd seed, overcame Spain's Oscar Hernandez 6-4 2-6 6-1 and then had some words of wisdom for Federer.
"You can't expect to be on top for 10 years," said Safin. "New guys are coming. They're hungry, they're faster, they're playing better. It's something new for them.
"For Roger, he has already been on the tour for nine or 10 years and has seen everything. Guys see the opportunity of beating him and that's what happens.
"He's getting old and the young guys want to beat him. Eventually they will crack him down. The older he gets, the more people are going to beat him. That's the way it is."
Britain's number one Andy Murray starts his campaign against Juan Monaco on Saturday.
Meanwhile, in the women's tournament seventh seed
progressed with a 6-0 6-3 defeat of Ukraine's Mariya Koryttseva.
had a more comfortable passage to the third round, as the world number two swept aside Mathilde Johansson of France 6-1 6-3.
had to fight hard for a 6-0 3-6 6-3 win over 18-year-old wildcard Anastasia Pivovarova of Russia, who is ranked 172nd in the world.
, seeded eighth, also needed three sets to beat Austrian Tamira Paszek 2-6 7-5 6-1.