Australian two-time Grand Slam singles champion Mervyn Rose, who went on to coach greats Margaret Court and Billie Jean King, has died, tennis officials said Tuesday. Rose, who won the Australian Open and French Open along with five Grand Slam doubles titles, was 87. “The tennis family is mourning the passing of seven-time Grand Slam champion Mervyn Rose and our thoughts are with his family and friends,” said Tennis Australia. Rose claimed his first major title at the 1954 Australian Open, defeating defending champion and top seed Ken Rosewall on the way to the final, where he beat his long-time doubles partner Rex Hartwig.