BRIEF-Tennis-Nadal to make Wimbledon decision on Tuesday

MADRID, June 8 (Reuters) - World number one Rafael Nadal is undergoing tests on his knees in Barcelona to determine whether he can defend his Wimbledon title later this month, the Spaniard said on Monday.

A decision is expected to be announced at around 1230 GMT on Tuesday, a statement on the player's official website (www.rafaelnadal.com) said.

Nadal was forced to pull out of this week's traditional Wimbledon warm-up tournament at Queen's Club in London because of problems with his knees.

(Writing by Mark Elkington; Editing by Clare Fallon; To query or comment on this story email sportsfeedback@thomsonreuters.com)