The former rugby player, 50, was diagnosed with the disease in February and later underwent an operation to remove his prostate.
England rugby union coach suggested the US Open champion has been "distracted" by fame.
The BBC Sport presenter chats mental health, grief and how daily exercise feels "cleansing".
'I won’t intervene.'
Want to look fabulous and maximise your morning sleep? Doesn’t everyone?
Sun, sea, sand… and gorgeous-looking summer skin.
Keep your mornings running smoothly with these tips from Gabby Logan.
How to get your lot up and out ☀️