John Isner, Sloane Stephens give U.S. winning start at Hopman Cup

John Isner and Sloane Stephens virtually ended Spain's chances in international mixed team competition.
Will Russell/Getty Images

In other first-round matches, Yvonne Meusburger beat seventh-seeded Mona Barthel 6-4, 6-3 and fifth-seeded Jamie Hampton beat wild-card entry Tamira Paszek 1-6, 6-0, 6-3.

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