The pair completed a flawless 3 - 0 victory over Japan in Belgrade in February ( 4 - 1 when dead rubbers are taken into account ) .
Ana herself is on a seven - match winning streak in the Fed Cup .
The pair completed a flawless 3 - 0 victory over Japan in Belgrade in February ( 4 - 1 when dead rubbers are taken into account ) and Ana herself is on a seven - match winning streak in the Fed Cup .