US Open QF Day 1 Round up: Hingis-Mirza enter semis

The Serb will face Cilic in the US Open semis

Novak Djokovic enters the semis after a 6-1, 3-6, 6-3, 7-6 (2) win over Feliciano Lopez

5 match points for the World No. 1

Djokovic leading Lopez 5-1 in the tie-breaker

Djokovic and Lopez take the fourth set into the tie-breaker. Can Lopez prolong this match anymore?

Lopez and Djoko hold their serves in the opening games of the fourth set.

Djokovic takes the third set 6-3

In a 5-set QF, reigning US Open champion Marin Cilic beats Jo-Wilfried Tsonga 6-4, 6-4, 3-6, 6-7 (3-7), 6-4 to progress to the semifinals.

Not how he planned that second set https://t.co/3bGQc5FRdY
— Joe Fleming (@ByJoeFleming) September 9, 2015

Djokovic up a break in the third, and will serve at 2-0 (EPA) http://t.co/8T1fQCfD7f pic.twitter.com/XjiUCQ3v5B
— Joe Fleming (@ByJoeFleming) September 9, 2015

Djokovic and Lopez are level at one set apiece, with 6-1, 3-6 to the World No. 1.

#Lopez saves a break point & holds for the 2nd set 6-3. It's now a best-of-three for the SF vs. #Cilic #usopen pic.twitter.com/sh5ZMloplM
— US Open Tennis (@usopen) September 9, 2015

After winning the first set 6-1, Novak Djokovic trails Feliciano Lopez 3-0 in the second. pic.twitter.com/38xPJX8YtF
— TENNIS.com (@Tennis) September 9, 2015

The men's QF is underway as World No. 1 Novak Djokovic plays 18th seed Feliciano Lopez. The top seed has won the first set 6-1.

And that's the Williams-Williams quarter-final done and dusted as Serena Williams takes it 6-2, 1-6, 6-3. She will see Italy's Roberta Vinci in the pair's semi-final match. Serena is now one step closer to a Calendar Slam.

Serena leads Venus in the decider. 4-1. Oprah getting the biggest cheer of anyone. 🇬🇧http://t.co/mo7cKzL3oz pic.twitter.com/Accu8NdCKW
— BBC Tennis (@bbctennis) September 9, 2015

PIC: #SerenavsVenus 6/6 pic.twitter.com/Ras9YKIxMz
— 3030 (@jose3030) September 9, 2015

Venus 21-9 winners to errors, Serena 32-18. Amazing stats considering how hard they're hitting. #SerenavsVenus
— TheBodyServe (@TheBodyServe) September 9, 2015

Serena with her 9th ace to lead 4-1 against Venus. This is some quality tennis we are watching. #SerenavsVenus #WilliamsSisters #SSTennis
— Usher Komugisha (@Pinkett888) September 9, 2015

And Serena has taken it right back. With some blazingly fast service, she is 3 games up to love in the final set and so far, looks poised for a semi-final berth. If she wins, top seed Serena will face Italy's Roberta Vinci in the US Open semi-finals.

Donald Trump is at #SerenavsVenus
— Namratha Konduru (@namrathak_) September 9, 2015

121 mph serve by @serenawilliams. Fastest of the night. 🔥🎾🔥 #SerenavsVenus
— Dimplez (@MissDimplez) September 9, 2015

#Serena holds to open the third set. #Serena leads #Venus 6-4 in three-setters all time. #usopen
— US Open Tennis (@usopen) September 9, 2015

#Venus takes set two, 6-1. Tonight, they play a final set at the #usopen for the first time. http://t.co/76skaDzTnM pic.twitter.com/gwk5Us4np9
— US Open Tennis (@usopen) September 9, 2015

And Serena has been stronger the past few years, but Venus has made a fight of this. Up 4 games over Serena in the second set and leading 5-1, she is serving for the set.

That was not entirely expected.. #Venus now up 5-1, and is serving for the 2nd set. #SerenavsVenus #USOpen
— Sportskeeda Tennis (@SK__Tennis) September 9, 2015

That #Venus determination in the 2nd set though... #USOpen #SerenavsVenus pic.twitter.com/dYhwtiDCQj
— David (@daviddigili) September 9, 2015

It's not over till it's over. Venus gets a break, and the older Williams is now up 3-1 in the second set. The match is on again.

Venus gets her break. Now serving up 3-1 in the second set. #SerenavsVenus #USOpen
— Stanley Kay (@citizen_kay) September 9, 2015

Second serve ace from Venus and she holds for 2-1 in the second set. #SerenavsVenus pic.twitter.com/2E39vvknzb
— Live Tennis (@livetennis) September 9, 2015

Three emphatic holds to begin the second set, as #Venus takes a 2-1 lead.
— US Open Tennis (@usopen) September 9, 2015

#Serena Williams merebut set pertama dgn 6-2. #SerenavsVenus #USOpen pic.twitter.com/lDQZkN7HYD
— In Your Heart (@Ivy_Yetti) September 9, 2015

And top seed Serena made quick work of that! 33 minutes into the match and Serena takes the first set 6-2. She has hit 15 winners so far.

Behind 12 winners and just *two* unforced errors thus far, #Serena grabs another break and leads #Venus 5-2. #usopen
— US Open Tennis (@usopen) September 9, 2015

The most-awaited match of the US Open so far is here as the Williams sisters take each other on at Flushing Meadows. They have met at the Open 4 times previously, with each taking two wins. World No. 1 Serena is 3 games up in the first set to Venus' 2.

#Serena strikes first! A break of the #Venus serve gives her a 3-2 lead in the first set. pic.twitter.com/zrlAJp74aM
— US Open Tennis (@usopen) September 9, 2015

Cilic does it! The defending champion has defeated Tsonga 6-4, 6-4, 3-6, 6-7, 6-4 in an epic quarterfinal match. Cilic wasted three match points in the 4th set and another one in the fifth set before finally putting the match to rest on his 5th match point.

Tsonga wins the fourth set 7-6(3) after saving 3 match points, and we're going five!

Tsonga takes the 3rd set against Cilic 6-3! This match is not over yet.

Cilic takes the second set against Tsonga 6-4, and is now just one set away from the semis!

Marin Cilic has taken the first set against Jo-Wilfried Tsonga 6-4 in the first men's singles quarterfinal. The defending champion is looking in good shape!

Sania-Hingis have defeated Chan-Chan 7-6, 6-1 to advance to the women's doubles semis!

Sania Mirza-Martina Hingis lead 3-0 in the second set

Cilic holds on to make it 3-3 against Tsonga

Hingis-Mirza break the Chan sisters to lead 2-0 in the second set

Hingis-Mirza win the first set 7-6. They were trailing 5-0 at one point

What a comeback by Hingis and Mirza as they level the set score at 5 each.

Jo-Wilfried Tsonga and Marin Cilic are on the court. Cilic leads the head to head record 4-1 in their last 5 meetings

Hingis-Mirza put up a fight as they hold their serve and break back. They trail 2-5 now

Hingis-Mirza will be serving to stay in the set as they trail the Chan sisters 5-0