Alexander Zverev, Ekaterina Makarova crowned champs at Citi Open

Alexander Zverev issued a warning to top ATP rivals Sunday after winning the Citi Open for his fourth title of the year -- he's not the next generation, he's the now generation.

Alexander Zverev, of Germany, returns the ball during the finals of the Citi Open tennis tournament against Kevin Anderson, of South Africa in Washington. | AP 

Alexander Zverev defeated Kevin Anderson 6-4, 6-4 to capture the302,000 euros) top prize at the US Open tuneup event on the Washington hardcourts. | AP

Kevin Anderson, of South Africa, returns the ball to Alexander Zverev, of Germany, during the finals of the Citi Open tennis tournament. | AP

Alexander Zverev, left, of Germany, shakes hands with Kevin Anderson, right, of South Africa, after the Citi Open tennis tournament. | AP

Alexander Zverev, of Germany, pumps his fist to the crowd as he celebrates his win over Kevin Anderson, of South Africa, in the finals of the Citi Open tennis tournament. | AP

Alexander Zverev, of Germany, poses with the trophy after he defeated Kevin Anderson, of South Africa, to win the Citi Open tennis tournament. | AP

Ekaterina Makarova, of Russia, returns the ball during the finals of the Citi Open tennis tournament against Julia Goerges, of Germany, in Washington. | AP

Julia Goerges, of Germany, returns the ball during the finals of the Citi Open tennis tournament against Ekaterina Makarova, of Russia in Washington. | AP

Ekaterina Makarova reacts during the finals of the Citi Open tennis tournament against Julia Goerges. | AP

Julia Goerges reacts during the finals of the Citi Open tennis tournament against Ekaterina Makarova. | AP

Ekaterina Makarova, left, of Russia, shakes hands with Julia Goerges, right, of Germany, after the finals of the Citi Open tennis tournament. | AP

Ekaterina Makarova, of Russia, poses with the trophy after her victory over Julia Goerges, of Germany, in the finals of the Citi Open tennis tournament. | AP