Take a look back at the US Open final match between Serena Williams and Caroline Wozniacki, but this time from a statistical perspective, all courtesy of Craig O'Shannessy and SAP.
WTA Staff

There are four elements to tennis - serving, returning, rallying and approaching - and Serena Williams owned all of them in the US Open final against Caroline Wozniacki.

Williams won 6-3, 6-3 by dominating every aspect of their strategic battle, making Wozniacki constantly react to her aggressive, powerful tactics. Williams was at the top of her game, employing first strike tennis to gain immediate control of points and ultimate control of the match.

Serving
Williams hit seven aces, three double faults, and only made 53% of her first serves for the match - 7% lower than her tournament average leading into the final. But when they went in it was devastating, as she only lost six points (20/26) on her first serve for the match. Williams also won 52% (12/23) of her second serve points, which was significantly higher than the 38% (9/24) that Wozniacki managed.

Williams was broken twice in the opening set but locked down in the second set to win all four of her service games.

Returning
Williams put 69% of her returns in play, lower than the 77% she averaged leading into the final, but there was a master plan behind the mistakes. Williams was overly aggressive against Wozniacki at the start of the point, essentially trying to end it before it began.

She took risks with big returns and some landed and others didn't, but the flow of points was still being played on her terms. No one in the women's game crushes returns like Williams. Williams hit four return winners for the match and committed 16 return errors, but at least those 16 points were not played on Wozniacki's terms, running her side-to-side in a baseline shootout.

Williams finished the tournament with 19 return winners, six more than her closest rival. She also finished the tournament ranked first in return games won at 59% (34/58).

Rallying
Because of the aggressive nature of play from Williams, the points won from the back of the court looked closer than the actual control of them in reality. Williams had a slight edge in shorter points (40 to 37), was more dominant in rallies five to eight shots long (14 to 4) and was fairly even once the rally got extended past nine shots, winning 11 to 8.

Overall, Williams won 28 baseline points to Wozniacki's 23 but how they were played, and the power that Williams controlled them, was one way traffic. The key stat in this area was that Williams had 17 groundstroke winners (11 forehand/6 backhand) for the match while Wozniacki could only manage a single backhand winner. It was very one-sided as rallies developed.

Approaching
Williams does not have a single hole in her game and coming to the net is something she also does exceptionally well. She won 87% (13/15) of her points coming forward to totally own the back of the court as well as the front. Wozniacki went 4/4 at the net and could have come in a lot more to try to pressure Williams into errors.

Match Flow
Williams faced a break point in her opening service game at 30-40 but a 114-mph ace out wide quickly averted that crisis. Williams then hit a backhand approach winner followed by another easy forehand approach winner, and she was establishing her early dominance with the hold of serve.

There were five consecutive breaks of serve early in the match before Williams was able to settle down and consistently hold serve.

Williams broke Wozniacki in the second game of the match with two big forehand winners from deuce, the last being a return winner down the line from the ad court. Williams would be broken in the next game at 2-0 when she committed a backhand error down the line.

Williams broke again for 3-1 but committed two double faults, including one on break point, for Wozniacki to climb back into the set at 2-3. Another break of serve followed as Wozniacki missed a forehand at 2-3, 30-40 into the net and the scoreboard was see-sawing back and forth with all the breaks.

Williams ultimately served out the first set at 5-3 as Wozniacki committed three forehand errors, all forced by Williams, and then the American hit a backhand down-the-line winner behind the running Dane to close the first set.

Williams would not be broken in the second set and raced to a 3-1 and 4-2 lead with a heavy bombardment of groundstrokes from the back of the court. She closed out the match by breaking Wozniacki when she hit a backhand crosscourt long.

Craig O'Shannessy (@BrainGameTennis) is the leading analyst for wtatennis.com throughout the 2014 season, utilizing SAP Data & Insights to uncover the patterns and percentages that dominate the game. Visit Craig's website at www.braingametennis.com for more expert strategy analysis.

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