Roger Federer easily reaches US Open's 4th round

"I like it like this, you know," Federer said with a smile. "I like three hours, five hours, too - as long as I end up winning them."

Roger Federer continued his dominant play at the U.S. Open with an easy win on Saturday :: Adam Hunger/Reuters

"I like it like this, you know," Federer said with a smile. "I like three hours, five hours, too - as long as I end up winning them."