US Open Tennis 2013 Results: Breaking Down Wednesday's Most Impressive Wins

Wow, what a spectacular Day 10 at the 2013 U.S. Open.

Not only did we see complete and utter dominance, we also saw yet another upset by a blistering underdog.

World No. 2 Victoria Azarenka disposed of Daniela Hantuchova in 79 minutes, but she didn't even make the list of the day's most impressive victories.

Here are the most impressive wins on Day 10 of the 2013 U.S. Open.

*All statistics via USOpen.org

Rafael Nadal (2) Dominates Tommy Robredo (19)

Ladies and gentlemen, Rafael Nadal is on fire in 2013.

The world No. 2 disposed of No. 19 seed Tommy Robredo in straight sets on Wednesday, 6-0, 6-2, 6-2. He won 86 percent of first-serve points, 61 percent of second-serve points, 94 percent of net points, 70 percent of break points and 56 percent of return points while posting 28 winners.

Here's video of Nadal capturing the second set, courtesy of the U.S. Open's official Twitter account:

Nadal said after the match, per Diane Pucin of the Los Angeles Times: "I'm very happy today. I think I played my best match yet this year at the U.S. Open. Many thanks to everybody for the support being here. I am in the semifinals, an unbelievable result for me."

Nadal ranks eighth in the tournament in first-serve points won, first in second-serve points won, seventh in first-serve return points won, fifth in second-serve return points won and third in break points won.

Yeah, I'd say that's pretty dominant.

Richard Gasquet (8) Wins Marathon vs. David Ferrer (4)

Richard Gasquet came into Wednesday's match with a 1-8 lifetime mark against David Ferrer.

After three hours 23 minutes, he had a 2-8 lifetime mark against Ferrer.

Gasquet didn't dominate Ferrer by any means on Wednesday. But his victory was impressive because it was a model of resiliency. 

Gasquet won the first two sets against Ferrer in just over an hour, then watched as Ferrer stormed back, winning the next two sets to force a fifth and final set.

With Ferrer bearing down on him, knowing the Spaniard's career mark against him, Gasquet fought back to win the final set 6-3.

The match included a 26-shot rally in the fourth set, which Gasquet won, per the U.S. Open's official Twitter account:

The 27-year-old Frenchman won 68 percent of first-serve points and 67 percent of net points while racking up 52 winners.

This is the first time Gasquet has advanced past the fourth round in the U.S. Open, let alone reaching the semifinals. He faces Nadal with a place in the final on the line.

Flavia Pennetta Scores Third Straight Upset vs. Roberta Vinci (10)

Apparently, world No. 83 Flavia Pennetta wasn't content with simply defeating No. 4 seed Sara Errani.

Since then, she has defeated No. 27 seed Svetlana Kuznetsova (who had owned a 5-0 record against her), No. 21 seed Simona Halep (who is having a career year) and No. 10 seed Roberta Vinci.

Pennetta defeated Vinci in straight sets on Wednesday, 6-4, 6-1. It took her just over one hour. She won 77 percent of first-serve points and 53 percent of return points while posting 23 winners.

ESPN Tennis tweeted out highlights of the victory:

Pennetta will face world No. 2 Victoria Azarenka in the semifinals. At this point, anything's possible for the 31-year-old Italian.