Djokovic is being left behind as Nadal closes in on Federer. The Australian Open champion, Djokovic trails Nadal by a massive 1,300 points and did not help his cause when he lost in the quarterfinals to Britain's Andy Murray during a Toronto title defense a week ago.

He came to that event with minimal confidence after going out in the Wimbledon second round to Marat Safin. But the Serb may not be quite ready to resume the fight.

"I'm just trying to focus on my game, on my career and my matches. That's my priority," he said. "I just want to improve."

The winner has advanced beyond the Cincinnati second round for the first time this week on his fourth appearance.

"I'm only 21. I don't want to put an extra pressure. I have enough pressure and expectations of being a favorite in most matches I get in.

"Thinking about number two or number one in the world would create an extra amount of pressure, which I don't need at this moment."

Eighth-seeded Scotsman Andy Murray and American seventh seed James Blake advanced with straight-set victories.

Blake continued the rescue of a modest hardcourt start, producing a 6-3, 6-4 victory over Frenchman Gilles Simon, who won the Indianapolis title earlier this month.

Murray dropped an early break but roared back over erratic American Sam Querrey for a 7-6 (3), 6-1 victory. The British number one looked healthy after tweaking his knee in Toronto. A scan showed him good to play this week.

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