Nadal to test knees with grass exhibitions this week
LONDON -- Defending Wimbledon champion Rafael Nadal will test his injured knees by playing two exhibition singles matches on grass at the Hurlingham Club in London this week, organizers say.
The top-ranked Nadal will play Lleyton Hewitt of Australia on Thursday and Stanislas Wawrinka of Switzerland on Friday.
The Spaniard has been having treatment on his knees after pulling out of the Wimbledon warm-up event at Queen's Club last week.
The Wimbledon Championships start on Monday.
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