Latino voters showed up in force for Clinton in California, while Obama's strength among African Americans allowed him to post decisive victories in the South.

NPR: Solid Wins for McCain; Clinton, Obama Close

Russia's strength in depth - with six players in the WTA top 20 - proved decisive, with the champions able to retain the trophy in the absence of star names such as Maria Sharapova and Olympic champion Elena Dementieva.

BBC: Russia cruise to Fed Cup defence