The 2013 Wimbledon Championships have brought their fair share of surprising results, and it's left us with a lot to learn moving forward in the world of tennis.
From superstar icons exiting the tournament early to unheralded players making a run at the title, the suspense hasn't been in short supply at the All England Lawn Tennis and Croquet Club.
Now, we're left to make conclusions from the action at one of the most iconic events in the entire sports landscape.
Although the main event—Novak Djokovic vs. Andy Murray for the men's singles title—hasn't been decided yet, we still have plenty to learn from the results after Saturday wrapped up a good bit of the action in London.
Let's take a look at the biggest takeaways from this year's Wimbledon.
Men's Singles Becoming Less Predictable
One thing is certain after this year's Wimbledon: The Big Four of men's singles is becoming uncharacteristically unpredictable.
Since the 2005 French Open, only one Grand Slam was won by somebody outside those four (2009 U.S. Open, Juan Martin del Potro). That's an absolutely staggering statistic.
Now, we see the likes of David Ferrer, Jo-Wilfried Tsonga, del Potro and many more formidable players who have proven that the Big Four are conquerable on the big stage.
It used to be all but certain that the semifinal round would include at least three of the Big Four, but the last two Grand Slams have only featured two each.
While it still seems like a lock for one of these four players to win every major tournament, that notion is growing increasingly doubtful as poor performances keep adding up.
Federer and Nadal Have Some Catching Up to Do
For years, Roger Federer and Rafa Nadal held a stranglehold over the sport of tennis. Between the two, they've won 28 of the last 38 Grand Slams before this year's Wimbledon.
It seemed like an absolute impossibility that both of these all-time greats would be bounced before the third round even got underway. This is especially true at the sport's most recognizable event.
Federer has generally maintained competence despite being on the wrong side of 30 years old (he's 31). But now, he's won just two of the last 14 Grand Slams and his second-round exit this year only proved that he's slowly falling.
Nadal has been a force on clay courts, but hardly that on other surfaces. He hasn't made it past the second round at Wimbledon in his last two tries, which is nothing short of jaw-dropping.
Sure, Federer rekindled his prime in last year's Wimbledon and Nadal is still unbeatable at the French Open. But to ignore both of these stars' early exits in London would be nothing short of foolish.
Sabine Lisicki—Get to Know Her
If you haven't heard of Sabine Lisicki, listen up. She'll be around for a while.
The 23-year-old German phenom is one of the up-and-coming women's tennis stars, and her career's biggest moment yet came last week at the All England Lawn.
It also happened to be one of the biggest moments of the tournament, as she knocked off No. 1 Serena Williams in the fourth round to make for another monumental upset. In doing so, she took down the only sliver of continuity the women's singles bracket had left.
However, we should've expected that much from Lisicki given her recent endeavors. In 2012, she beat top-seeded Maria Sharapova at Wimbledon in helping pave the way for Serena's championship. Lisicki would make it to the quarterfinal, almost matching her semifinal appearance in 2011 at the All England Lawn.
This year, she topped both of those feats by making it to the championship match before being ousted by France's Marion Bartoli in straight sets. But her ascension as a women's tennis star came full-circle this week, and she'll be a household name before you know it.