US Open, 2011: Day 1

Fireworks during the opening ceremony for the US Open in New York. (AP Photo)

Roger Federer of Switzerland plays Santiago Giraldo of Colombia during the first round of the US Open in New York. (AP Photo)

Venus Williams of the United States pumps her fist after defeating Russia's Vesna Dolonts 6-4, 6-3 in the first round of the US Open in New York. (AP Photo)

Russia's Maria Sharapova returns the ball against Heather Watson of Great Britain during the first round of the US Open at the USTA Billie Jean King National Tennis Centre in the Flushing Meadows, New York. (AFP Photo)

Alexandra Dulgheru of Romania returns the ball against Petra Kvitova of Czech Republic during the first round match of the US Open at the USTA Billie Jean King National Tennis Centre in the Flushing Meadows, New York. (AFP Photo)

French player Marion Bartoli returns a shot to Russia's Alexandra Panova during the first round of the US Open in New York. (AP Photo)

Gael Monfils of France returns the ball to Grigor Dimitrov of Bulgaria during the first round of the US Open in New York. (AP Photo)

Santiago Giraldo of Colombia returns against Roger Federer during the first round of the US Open in New York. (AP Photo)

Petra Kvitova of Czech Republic serves the ball against Alexandra Dulgheru of Romania during the first round of the US Open at the USTA Billie Jean King National Tennis Centre in the Flushing Meadows, New York. (AFP Photo)

Mardy Fish returns a shot to Tobias Kamke of Germany during the first round of the US Open in New York. (AP Photo)

Viktor Troicki of Serbia reacts while playing Alejandro Falla of Colombia during the first round of the US Open in New York. (AP Photo)