That gives her an extra week to rest the shoulder , but no one -- perhaps even Serena -- knows how ready it will be for seven potential matches in New York .
Serena accepted a wild card into last week 's Cincinnati tournament , but eventually withdrew .
That gives Serena an extra week to rest the shoulder , but no one -- perhaps even Serena -- knows how ready it will be for seven potential matches in New York .
Serena accepted a wild card into last week 's Cincinnati tournament , but eventually withdrew .