Italy's Karin Knapp, left, and Nastassja Burnett wave the Italian flag as they celebrate after Knapp defeated United States' Alison Riske during a Fed Cup world group tennis match on Sunday, Feb. 9, 2014, in Cleveland. (AP Photo/Tony Dejak)

US Italy Fed Cup Tennis

Italy's Karin Knapp, left, and Nastassja Burnett wave the Italian flag as they celebrate after Knapp defeated United States' Alison Riske during a Fed Cup world group tennis match on Sunday, Feb. 9, 2014, in Cleveland. (AP Photo/Tony Dejak)

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