Serena survives Stephens in third-round US Open test
A sure-footed Stephens pounced early as third seed Williams struggled with her first serve and committed 13 unforced errors in the first set, claiming an early break for a 2-1 lead.

A sure-footed Stephens pounced early as third seed Williams struggled with her first serve and committed 13 unforced errors in the first set, claiming an early break for a 2-1 lead.