He participated at Beijing (2008) and London (2012).
Yes
one only one
yes he did and he also joined the Beijing Olympics this year.
Tomas Berdych
Switzerland
She has been to two Olympics, the 2004 Olympics and the 2008 Olympics.
Roger Federer met his long-time girlfriend, Mirka Vavrinec, at Syndey 2000 Olympics
She has been in one Olympics.
Roger Federer has been to many finals, but as of September 6th 2009, he has not yet made it to the US Open Finals.
There are many, many sports that have not been events in the Olympics
I think it is 2 Olympics She has been in
The gymnastics has been in the Olympics since 1896.