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‘Kawaisou’ or ‘wagamama’ (poor thing or spoiled brat)? That’s the question Japanese tennis fans have been asking ever since world number two Naomi Osaka quit the French Open, having refused to fulfil her post-match press conference obligations. The tennis superstar cited mental health problems for her reluctance to be quizzed by journalists, after which she was censored sharply, and handed a $15,000 (£11,000) fine. She was told to comply, but has chosen not to, packing her bags and leaving instead.  Osaka has said that she suffers ‘bouts of depression’ and has confessed to a chronic shyness that prompts her to wear headphones to shut out the world whenever she is at a tournament.