FOR three weeks each summer, I moonlight as a tennis correspondent for a tabloid newspaper. So it was with particular interest that I listened to a speech by Venus Williams in Dubai last weekend. After thanking the tournament’s sponsors and collecting the winner’s cheque for $500,000, the champion, who is as remarkable for what little she usually says as for her prowess on a tennis court, suddenly veered off-message with the waywardness of one of her hapless opponent’s forehands. Williams refe