Tennis legend satisfied at Queens (7)

I believe the answer is:

federer

I'm a little stuck... Click here to teach me more about this clue!

'tennis legend' is the definition.
I know nothing about this answer so I cannot judge whether this works.

'satisfied at queens' is the wordplay.
I cannot quite understand how this works, but
'satisfied' could be 'fed' (I've seen this in another clue) and 'fed' is present in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.

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