Sharapova plays vinci in stuttgart opener radwanska in waiting

It looks like you're referring to the 2013 Porsche Grand Prix in Stuttgart, Germany. Here's the correct information:

• Maria Sharapova played against Roberta Vinci in the opening match of the tournament.
• Agnieszka Radwańska was indeed the next opponent in Vinci's path, but Sharapova won the match against Vinci, setting up a quarterfinal encounter with Radwańska.

Here's the actual scoreline:

• Maria Sharapova def. Roberta Vinci, 6-4, 6-3

And then, in the quarterfinals:

• Maria Sharapova def. Agnieszka Radwańska, 6-4, 6-3