Concert: Entremont and the Hong Kong Philharmonic. Ravel Piano Concerto. City Hall Concert Hall. Tonight and tomorrow (Dec 8-9), 8pm. Tickets $100-$300. Urbtix: 2734 9009 The phone calls would either come at midnight or at 6am. This one was a dawn call and as the youthful pianist Phi-lippe Entremont picked up the receiver in his Paris flat he suspected he would be in trouble. His irascible, extraordinary teacher Marguerite Long had 'forbidden' her student from ever playing 'her' concerto while she was alive. And as a salvo he had flown to Philadelphia and not only played the concerto that Ravel had dedicated to her, but had the audacity to record it, with Eugene Ormandy as conductor. And he had sent it to her in the post. 'Philippe!' said the familiar voice of his octogenarian teacher. 'I got the recording and ? OK, you can do this concerto,' she said. Entremont, 66, will be performing the Ravel concerto with the Hong Kong Phil-harmonic tonight, as well as conducting the rest of the all-French programme. Every time he plays it, as well as many times when he does not, he remembers Long. She was a fighter until she died, aged 90. 'When she was 88 she received a letter saying she had to leave her apartment' Entremont says. 'She called her lawyer and he said there was no need to worry because, with appeals, they could keep everything unresolved for 15 or 20 years.' To which Long replied: 'And what happens after that?' Entremont, who was a teenager when they first met, had 'an extremely torrid and cold relationship' with the grande dame of piano in Paris. 'The ups were tremendous and the downs were abysmal: she had a terrible character, but I loved her and she loved me.' This year Entremont is celebrating 50 years on the concert circuit since his first public performance at 16 in Barcelona. Or rather his publicists are celebrating it. 'For me I don't think about it at all,' he says. The anniversary, he insists, is not a watershed. 'I'm not going to think about what I can do next,' he says. 'I could drop dead tomorrow, but you can do that when you are 20 as well.'