Still, Djokovic likes the idea of some players getting a chance to introduce themselves to a wider audience.
"It's interesting . . . to see new faces - for the crowd, for [the] tennis world, in general," said Djokovic, who might not feel quite the same way if he were among the 11 men and women seeded in the top 10 who no longer are playing.
Truth is, there hasn't been much variety of late at Grand Slam tournaments, especially at the very end: Federer, Nadal and Djokovic have won 31 of the past 33 titles.
"It's good [to have] change, in a way, because it's always expected, obviously, from top players to reach the final stages of major events. When it doesn't happen, it's a big surprise," said the top-seeded Djokovic, whose six Grand Slam titles include Wimbledon in 2011. "It's a bit [of a] strange feeling not to have Federer or Nadal at the second week of a major. In the last 10 years, it was always one of them."
Over a shorter stretch, it's also always been Djokovic, who meets 35-year-old Tommy Haas today. Djokovic has played in 16 consecutive Grand Slam quarterfinals - the longest active streak, now that Federer's 36-major run is done. At the past 10 Slams, Djokovic has reached the semifinals every time, picking up five trophies and three runner-up finishes.
Murray, meanwhile, has been a finalist at the last three major tournaments he entered and won the U.S. Open in September, only increasing the expectation among the locals that he can deliver Britain's first male champion at Wimbledon in 77 years.
Nothing is guaranteed right now, though.
"Second week of a Grand Slam is a new start, especially here, where you have [time] off," said 15th-seeded Marion Bartoli, the 2007 Wimbledon runner-up who faces the 104th-ranked Knapp, an Italian making her first appearance in a major's fourth round. "It's really a When play resumes today with all 16 men's and women's fourth-round matches - Wimbledon is the only Grand Slam tournament that sets things up that way - fans get a chance to discover some folks they might not recognize immediately.
Five of the remaining 16 men are making their fourth-round Wimbledon debuts; only one in that group has ever been that far elsewhere. Six never have reached a Grand Slam quarterfinal: de Schepper, Dodig, Janowicz, Lukasz Kubot, Mannarino, and Andreas Seppi. Perhaps not coincidentally, each of those relatively unknown half-dozen players benefited from at least one of the record-tying 13 walkovers or mid-match retirements from injury or illness so far.
Four of the 16 women left are hoping to reach a major quarterfinal for the first time: Laura Robson, Knapp, 19-year-old Monica Puig of Puerto Rico, and 20th-seeded Kirsten Flipkens of Belgium.
The No. 1-ranked Williams, naturally, is an overwhelming favorite to win the title. She is a five-time Wimbledon champion, including last year. She owns 16 Grand Slam titles all told, while the other 15 women in the tournament own two among them: Li's at Roland Garros, and Petra Kvitova's at Wimbledon in 2011.