IN PICTURES: The US Open

Maria Sharapova makes it to the 4th round, Marin Cilic shocked by Diego Schwartzman

The United States Open Tennis Championships

Maria Sharapova of Russia in action during her third round match against Sofia Kenin of the US. (Reuters)

The United States Open Tennis Championships

John Isner of the US reacts during his third round match against Mischa Zverev of Germany (Reuters)

The United States Open Tennis Championships

Venus Williams of the United States celebrates her win against Maria Sakkari of Greece during their third round match. (Reuters)

The United States Open Tennis Championships

Petra Kvitova of the Czech Republic in action against Caroline Garcia of France (not pictured) during their third round match. (Reuters)

The United States Open Tennis Championships

In picture: Diego Schwartzman of Argentina in action against Marin Cilic of Croatia during their third round match. (Reuters)

The United States Open Tennis Championships

Sam Querrey of the U.S. in action during his third round match against Radu Albot of Moldova (Reuters)

The United States Open Tennis Championships

Caroline Garcia of France in action against Petra Kvitova of the Czech Republic during their third round match (Reuters)

The United States Open Tennis Championships

Denis Shapovalov of Canada celebrates during his second round match against Jo-Wilfried Tsonga of France (Reuters)

The United States Open Tennis Championships

Rafael Nadal of Spain celebrates winning his second round match against Taro Daniel of Japan (Reuters)

The United States Open Tennis Championships

Roger Federer of Switzerland reacts during his second round match against Mikhail Youzhny of Russia. (Reuters)

The United States Open Tennis Championships

Timea Babos of Hungary celebrates winning first set against Maria Sharapova of Russia in their second round match. (Reuters)