TOKYO: Gymnastics superstar Simone Biles’ participation in the rest of the Tokyo Olympics was plunged into doubt by an unspecified medical issue on Tuesday while Japanese star Naomi Osaka crashed out of the tennis competition.Biles exited the women’s team final after a lacklustre opening vault and briefly left the competition floor, before returning to join her teammates.But the US team replaced her in the three remaining routines on the uneven bars, beam, and floor and Biles was reduced...