Navratilova triumphantly covering court (6)

I believe the answer is:

atrium

'court' is the definition.
(atrium is a kind of court)

'navratilova triumphantly covering' is the wordplay.
'covering' indicates a hidden word.
'ATRIUM' is hidden within 'navratilova triumphantly'.

(Other definitions for atrium that I've seen before include "Roofed courtyard" , "Um, I rat on the chamber of the heart" , "Central area in a building, open or with a glass roof" , "Central court/hall" , "An upper chamber of the heart" .)

I've seen this clue in The Guardian.

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