I was never Rudolf Nureyev’s greatest fan. I must have seen him dance 30 or 40 times, starting with a Bayadère in the mid-1960s, and while his sheer presence remained so potent that he was always exciting to witness, I became increasingly aware of how fiercely willed his dancing was – a struggle with or against his own body, almost self-punishing (he believed that he performed at his best when he was totally exhausted).