First-week action at the U.S. Open

Fans wait for Maria Sharapova after defeating Alexandra Dulgheru in the second round. (Streeter Lecka / Getty Images)

Bob Bryan (left) and Mike Bryan return a shot against Max Mirnyi and Mikhail Youzhny during their men’s doubles first-round match. (Matthew Stockman / Getty Images)

Monica Puig of Puerto Rico reacts against Andrea Petkovic of Germany during their second-round match. (Alex Goodlett / Getty Images)

Venus Williams serves to Timea Bacsinszky of Switzerland. (SHANNON STAPLETON / REUTERS)

Maria Sharapova returns a shot against Alexandra Dulgheru during their second-round match. (Streeter Lecka / Getty Images)

Madison Brengle greets Sabine Lisicki of Germany after their second-round match. (Elsa / Getty Images)

Alexandra Dulgheru returns a shot against Maria Sharapova during their second-round match. (Al Bello / Getty Images)

Jeremy Chardy of France reacts against Blaz Kavcic during their first-round match. (Alex Goodlett / Getty Images)

Madison Brengle of the U.S. hits a return to Sabine Lisicki of Germany. (JUSTIN LANE / EPA)

Jelena Jankovic of Serbia misses a shot against Tsvetana Pironkova of Bulgaria. (KENA BETANCUR / AFP/Getty Images)

Sabine Lisicki of Germany hits a return to Madison Brengle of the U.S. (JUSTIN LANE / EPA)

Peng Shuai of China celebrates after defeating Poland’s Agnieszka Radwanska. (Mike Segar / Reuters)

Tomas Berdych celebrates his win against Lleyton Hewitt. (Eduardo Munoz / Reuters)

Rangers goalie Henrik Lundqvist, Roger Federer and Michael Jordan pose for a photo following Federer’s match. (Matthew Stockman / Getty Images)

Roger Federer meets Marinko Matosevic after defeating him in their first-round match on Tuesday. (Elsa / Getty Images)

Michael Jordan waves to Roger Federer after Federer defeated Marinko Matosevic in the first round on Tuesday. (SHANNON STAPLETON / REUTERS)

Serena Williams returns a shot to Taylor Townsend during their first-round match. (Elsa / Getty Images)

Gael Monfils serves to Jared Donaldson. (JUSTIN LANE / EPA)

Michael Jordan watches as Roger Federer faces Marinko Matosevic on Tuesday night. (Elsa / Getty Images)

Eugenie Bouchard of Canada walks off of the court after winning her first-round match. (Al Bello / Getty Images)

Olga Govortsova, left, and Eugenie Bouchard meet at the net to shake hands after the match. (Al Bello / Getty Images)

Olga Govortsova stretches for a shot. (Justin Lane / EPA)

Olga Govortsova hits a return to Eugenie Bouchard. (Justin Lane / EPA)

Eugenie Bouchard of Canada falls during the match. (Justin Lane / EPA)

Olga Govortsova of Belarus returns a shot against Eugenie Bouchard. (Al Bello / Getty Images)

Eugenie Bouchard of Canada celebrates her victory over Olga Govortsova. (Kena Betancur / AFP/Getty Images)

Eugenie Bouchard volleys with Olga Govortsova. (Kena Betancur / AFP/Getty Images)

Eugenie Bouchard of Canada tosses the ball for a serve. (Kena Betancur / AFP/Getty Images)

Eugenie Bouchard return a shot to Olga Govortsova. (Eduardo Munoz / Reuters)

Victoria Azarenka serves. (Mike Segar / Reuters)

Marcos Giron of the U.S. hits a shot between his legs to fellow American John Isner during their first-round match at the U.S. Open in New York on Tuesday. (Adam Hunger / Reuters)

Misaki Doi of Japan serves to Victoria Azarenka of Belarus. (Mike Segar / Reuters)

Canada’s Eugenie Bouchard is mobbed for autographs after defeating Olga Govortsova. (Eduardo Munoz / Reuters)

Petra Kvitova of the Czech Republic serves to Kristina Mladenovic of France. (Adam Hunger / Reuters)

Eugenie Bouchard cools off during a break from her match against Olga Govortsova. (Eduardo Munoz / Reuters)

Novak Djokovic serves against Diego Schwartzman of Argentina on Monday night. (Streeter Lecka / Getty Images)

Maria Sharapova waves to the crowd after beating Maria Kirilenko. (SHANNON STAPLETON / Reuters)

Boris Becker, the coach of Novak Djokovic of Serbia, looks on during his first-round match. (Julian Finney / Getty Images)

Diego Schwartzman returns a shot against Novak Djokovic during their first-round match. (Streeter Lecka / Getty Images)

Novak Djokovic returns a shot against Diego Schwartzman of Argentina. (Streeter Lecka / Getty Images)

Golfer Bubba Watson and his wife, Angie, watch the match between as Novak Djokovic and Diego Schwartzman. (Streeter Lecka / Getty Images)

Milos Raonic returns a shot to Taro Daniel. (Julian Finney / Getty Images)

Donald Young returns a shot against Blaz Kavcic of Slovenia. (Julian Finney / Getty Images)

Tennis legends John McEnroe and Martina Navratilova hit tennis balls into the stands from the court of the Arthur Ashe Stadium during the opening night ceremony. (JUSTIN LANE / EPA)

Maria Sharapova hits a return to Maria Kirilenko. (JUSTIN LANE / EPA)

Fireworks shoot over Arthur Ashe Stadium during the national anthem performed by Fitz and the Tantrums. (JOHN G. MABANGLO / EPA)

Ball people attempt to catch a honey bee in front of Kimiko Date-Krumm during her first-round match match against Venus Williams. (Matthew Stockman / Getty Images)