Argentina's Leonardo Mayer lifts the trophy after winning his final match against Spain's David Ferrer at the tennis tournament in Hamburg, Germany, Sunday, July 20, 2014. Mayer defeated top seeded Ferrer with 6-7, 6-1 and 7-6. (AP Photo/dpa, Daniel Reinhardt)

Germany Tennis Hamburg

Argentina's Leonardo Mayer lifts the trophy after winning his final match against Spain's David Ferrer at the tennis tournament in Hamburg, Germany, Sunday, July 20, 2014. Mayer defeated top seeded Ferrer with 6-7, 6-1 and 7-6. (AP Photo/dpa, Daniel Reinhardt)

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