Father knows best, certainly in this case. More than 40 years after its sponsorship of Bjorn Borg began in 1975, FILA has added the Swede's 15-year-old son, Leo, to its stable of star endorsers.

Unshaven, his long hair lank and dirty, he wore a rumpled velour Fila warm-up ... kind of convoluted logic or mystical yearning: Bjorn Borg. Borg refers to Honsai as “the Professor.” ...

Two years after its advent, in 1975, five-time Wimbledon champion Björn Borg adopted the Fila uniform; with it, he created perhaps tennis’ most enduring look. This year, Fila is celebrating half a ...