ATP World Tour Finals 2015 Results: Friday Tennis Scores and Updated Schedule

Stan Wawrinka beat Andy Murray on Friday to grab the final ticket to the semi-finals of the ATP World Tour Finals 2015.

The two served up a great match but Wawrinka was in control from start to finish, winning 7-6 (4), 6-4. He'll meet Roger Federer in the next round.

Rafael Nadal had already qualified for the semi-finals but was forced to work hard against David Ferrer, who gave his compatriot all he could handle after a shaky start. The final set scores were 6-7, 6-3, 6-4. Here's a look at the full results and upcoming schedule:

Date		Score
Friday, Nov. 20	Rafael Nadal (5)	6-7 (2), 6-3, 6-4	David Ferrer (7)
Friday, Nov. 20	Stan Wawrinka (4)	7-6 (4), 6-4	Andy Murray (2)
Saturday, Nov. 21	Novak Djokovic (1)	TBD	Rafael Nadal (5)
Saturday, Nov. 21	Roger Federer (3)	TBD	Stan Wawrinka (4)

Wawrinka Beats Murray, Advances to Semi-Final

Murray and Wawrinka met during Friday's evening session, with the winner advancing to the semi-finals and the loser going home. 

As shared by sports writer Graham Ruthven, Murray's entourage decides against sitting close to the court, perhaps in an attempt to avoid another meltdown like the one the Scot suffered against Nadal:

It seemed to work early, as Murray immediately took Wawrinka to deuce in his opening service game. The Swiss and Murray served up some excellent, high-quality tennis in the first couple of games, with both holding their serve.

The third game provided the first really spectacular highlight of the evening, with Murray scoring one of the best passing shots you'll see all year. Sky Sports Tennis were kind enough to share the highlight:

Wawrinka had to work hard to hold his serve in that game, with Murray putting up a show from the base-line. But momentum started to shift slightly, with the Swiss taking more control over the rallies and finding plenty of success with his winners, particularly on his forehand.

He finally found the break in the eighth game, converting the second of three chances he was gifted by Murray. Wawrinka seemed to be on his way to a 1-0 set lead, but Murray flipped the script in the next game, winning a break of his own.

The decisive point was yet another stunning rally in which the Scot repeatedly dazzled with incredible defensive shots, before Wawrinka gave him a chance to finish with a lazy volley. Per BBC Tennis, Wawrinka wasn't pleased:

Murray tied things up in the next game, and with neither budging an inch during their next service games, the first set ended in a tie-break. The Scot took a 4-2 lead but folded under the pressure, hitting several unforced errors and allowing Wawrinka to steal the set.

Per ESPN Stats & Info, things weren't looking good for the Brit:

With momentum now clearly on Wawrinka's side, he pressed his advantage in the first game of the second set and immediately broke Murray's serve.

Murray couldn't respond this time, as Wawrinka suddenly started playing superb defensive tennis in combination with his raw power from the base-line. Another break followed in the seventh game of the second set, but Murray immediately broke back, keeping his hopes of advancing alive. 

The Scot fought tooth and nail to stay in the match and even found two break chances late, but Wawrinka kept his cool and finished things on his own serve. He'll meet compatriot Federer in the semi-finals. 

Nadal Remains Perfect

Nadal started the match on fire, immediately breaking Ferrer's serve in the opening game with some clean, powerful tennis. The nine-time Roland Garros winner looked sharp in the rallies and dominated from the baseline, sending Ferrer all over the court.

The 1-0 lead quickly turned into a 3-0 deficit, and tennis blogger Craig O'Shannessy loved his early efforts:

Ferrer wasn't about to just hand Nadal his third win of the competition, however. The veteran fought back and forced Nadal into playing a more defensive game, winning four consecutive games to shock the O2 Arena.

Nadal's strokes still looked clean, but Ferrer was playing far more aggressively at this point, and Nadal simply didn't have the opportunity to step into the court.

Back-to-back breaks in the 11th and 12th games had the fans on the edge of their seats, as Nadal squandered a golden opportunity to grab the first set. Saving three break points, he clumsily defended his first set point, giving Ferrer all the time in the world to hit a winner, before overhitting a deep forehand that meant the first set would end in a tiebreak.

O'Shannessy was shocked at how Nadal was playing a different type of tennis:

The tiebreak itself featured some sloppy play from both Spaniards, with Ferrer hitting a double-fault and Nadal overhitting several shots. A poor return handed Ferrer the first set, which no one probably saw coming after the first three games.

MailOnline's Stuart Fraser reminded fans what was at stake in this match:

Nadal recovered from an early deficit to take the first game of the second set, grabbing some much-needed momentum in the process. He started slicing his serves a little wider, putting less of his first serves in play but setting himself up well for the rallies.

Ferrer continued to look the stronger in the longer exchanges, but Nadal was doing a fine job avoiding those, with both men holding their serve fairly comfortably.

Per O'Shannessy, Ferrer was eyeing one shot in particular with most of his winners:

Nadal's improved serving started to make the difference, however. The seventh game of the second set was over in the blink of an eye, as Ferrer couldn't even find space to breathe, and following another double fault, Nadal finally grabbed a crucial break, setting him up to serve out the set.

He did just that, setting up a decider. Per Live Tennis, he was wasting quite a bit of energy with a big match on the schedule:

"

SET #Nadal 6-3! Going 3 - 22 hours before he faces #Djokovic ... Watch & bet on tennis at https://t.co/txueA5D56r pic.twitter.com/QCr4SkaaPN

— Live Tennis (@livetennis) November 20, 2015"

Ferrer held serve in an epic first game of the final set, a back-and-forth battle that had both players moving all over the court. Per Sky Sports, the game took no less than 20 points to be completed. 

The game set the tone for the rest of the set, as both players took plenty of risks with their serve. Break chances were few, and a tiebreak seemed inevitable. But tied 4-4, Nadal pushed his advantage, winning the first break of the set.

In an almost exact copy of the second set, Nadal served out the following game, winning the match in the process. After the match, Nadal reflected on the year he's had, via Sky Sports:

"

It was very important for me to finish the season playing like this, playing against the best in the world, and a big game tomorrow with the chance to compete against the world's number one.

It's been a tough year for me. Some strange feelingas for me on court at times. But I always work hard and in the last five weeks I'm playing much better.

"

Nadal will now meet Novak Djokovic in the semi-finals.

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