Wimbledon 2015 Results: Wednesday Scores and Thursday Bracket Predictions

Second-round action at the 2015 Wimbledon Championships began Wednesday and will continue on into Thursday's Day 4 slate, with many of the world's top tennis stars set to face big-time tests in the opening week of play.

Not all of the premier names in the sport are safe as the second round continues forward. No. 7 Ana Ivanovic and No. 5 Kei Nishikori were two of the biggest stars to fall in Wednesday's action, as Ivanovic fell in straight sets to Bethanie Mattek-Sands and Nishikori withdrew with a calf injury.

The top seeds in both brackets cruised in the process, with Serena Williams and Novak Djokovic each taking care of business in quick straight-set encounters. No. 16 Venus Williams kept the hope alive for a fourth-round clash with her sister, topping Yulia Putintseva in a tough two-set match.

Along with No. 9 Marin Cilic's dramatic five-set win and other memorable matches, Wednesday's action set the tone for what's to come. Take a look below at a full breakdown of where things currently stand and what to expect for Day 4. 

Wednesday, July 1 Scores

Men's Singles	Score
Women's Singles	Score
No. 1 Novak Djokovic def. Jarkko Nieminen	6-4, 6-2, 6-3
No. 4 Stan Wawrinka def. Victor Estrella Burgos	6-3, 6-4, 7-5
Santiago Giraldo def. No. 5 Kei Nishikori	Walkover
No. 9 Marin Cilic def. Ricardas Berankis	6-3, 4-6, 7-6, 4-6, 7-5
No. 7 Milos Raonic def. Tommy Haas	6-0, 6-2, 6-7, 7-6
No. 11 Grigor Dimitrov def. Steve Johnson	7-6, 6-2, 7-6
No. 14 Kevin Anderson def. Marsel Ilhan	6-7, 7-6, 6-4, 6-4
No. 16 David Goffin def. Liam Broady	7-6, 6-1, 6-1
No. 1 Serena Williams def. Timea Babos	6-4, 6-1
No. 4 Maria Sharapova def. Richel Hogenkamp	6-3, 6-1
No. 16 Venus Williams def. Yulia Putintseva	7-6, 6-4
No. 21 Madison Keys def. Stefanie Voegele	6-7, 6-3, 6-4
Bethanie Mattek-Sands def. No. 7 Ana Ivanovic	6-3, 6-4
No. 22 Samantha Stosur def. Urszula Radwanska	6-3, 6-4
Aleksandra Krunic def. No. 19 Sara Errani	6-3, 6-7, 6-2

Complete scores available at Wimbledon.com

2015 Wimbledon: Thursday, July 2 Predictions

Men's Singles	Court (Match No.)	Prediction
Women's Singles	Court (Match No.)	Prediction
No. 2 Roger Federer vs. Sam Querrey	Centre Court (2nd)	Federer
No. 10 Rafael Nadal vs. Dustin Brown	Centre Court (3rd)	Nadal
No. 3 Andy Murray vs. Robin Haase	No. 1 Court (1st)	Murray
No. 13 Jo-Wilfried Tsonga vs. Albert Ramos-Vinolas	No. 1 Court (3rd)	Tsonga
No. 6 Tomas Berdych vs. Nicolas Mahut	No. 2 Court (3rd)	Berdych
No. 12 Gilles Simon vs. Blaz Kavcic	No. 3 Court (2nd)	Simon
No. 18 Gael Monfils vs. Adrian Mannarino	No. 3 Court (3rd)	Monfils
No. 2 Petra Kvitova vs. Kurumi Nara	No. 1 Court (2nd)	Kvitova
No. 8 Ekaterina Makarova vs. Magdalena Rybarikova	No. 3 Court (1st)	Makarova
No. 5 Caroline Wozniacki vs. Denisa Allertova	Court 12 (1st)	Wozniacki
No. 10 Angelique Kerber vs. Anastasia Pavlyuchenkova	Court 18 (1st)	Kerber
No. 18 Sabine Lisicki vs. Christina McHale	Centre Court (1st)	McHale
No. 13 Agnieszka Radwanska vs. Ajla Tomljanovic	No. 2 Court (2nd)	Radwanska

No. 2 Roger Federer vs. Sam Querrey

Tim Ireland/Associated Press

The 2015 Wimbledon has long been pegged as one of Roger Federer's last great chances at winning Grand Slam No. 18 before the young talent of the sport makes it impossible. He's begun in style but will start to get tested by Sam Querrey in the second round Thursday.

Federer has been reeling ever since his French Open defeat to Stan Wawrinka, but it didn't really show in his Wimbledon debut. He opened up his tournament with a straight-set dispatching of Damir Dzumhur, 6-1, 6-3, 6-3. 

He further etched his place as the straight-set leader at Wimbledon in the process, as Mohandas Menon noted:

Federer and Querrey have both had long careers on the circuit but haven't been regular opponents across the net. They have met just twice in their careers, with no meetings since 2008. 

Of course, in those matches Federer is a solid 2-0 with no set defeats against Querrey. With his game seemingly in the right place, he should have no trouble slipping past him once again in straight sets.

Prediction: Federer wins, 6-2, 6-4, 6-4

No. 10 Rafael Nadal vs. Dustin Brown

Kirsty Wigglesworth/Associated Press

As shocking as it is that Rafael Nadal is a No. 10 seed at this year's Wimbledon, his continuously slipping quality of play is an obvious reason why. He has the chance to sway public opinion in his favor in the second round against Dustin Brown Thursday.

Nadal's second defeat at the French Open in the last decade just over a month ago had the feeling of inevitability, but the Spaniard looks poised to right his wrongs at Wimbledon. He opened up his tournament with a straight-set performance over Thomaz Bellucci.

With that said, he could be in for some trickiness in his next match. Brown is an unconventional opponent with a crafty style of play that could frustrate Nadal.

In fact, Brown is 1-0 in his career against Nadal after topping him last year in Halle. That was a straight-sets outing in which Brown proved he can contend with Nadal—or at least the watered-down version of Nadal that the tennis world sees today.

With that said, Nadal raises his game when it's needed most. Expect a hard-fought match in which the Spaniard reigns supreme.

Prediction: Nadal wins, 4-6, 6-4, 7-5, 6-3

Christina McHale vs. No. 18 Sabine Lisicki

Andrew Medichini/Associated Press

Up-and-coming 23-year-old American Christina McHale has an opportunity to notch one of the biggest wins of her young career and match her longest run at a Grand Slam in Thursday's second-round meeting with No. 18 Sabine Lisicki.

Both players got things rolling at Wimbledon with straight-set first-round victories, but Lisicki underwent plenty of struggles to get herself there. She won just 46 percent of her first serves in the opening round against Jarmila Gajdosova, hitting seven double-faults as well.

Meanwhile, McHale is coming directly off a confidence-boosting 6-3, 6-2 win over Johanna Larsson in the first round. She's 0-1 for her career against Lisicki but has never played better tennis than at this current moment.

Playing on her first-ever match on the Centre Court, McHale will step up her game to pull off the upset.

Prediction: McHale wins, 6-4, 4-6, 7-5