Venus Williams (back) pulls out of Madrid Open

Updated: May 5, 2013, 9:16 AM ET
Associated Press

MADRID -- Venus Williams has withdrawn from the Madrid Open because of back problems.

The American was set to open the tournament Sunday.

Switzerland's Stefanie Voegele took Williams' place in the first round against Anabel Medina Garrigues of Spain.

Copyright 2013 by The Associated Press

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