Taylor Fritz was upset by Brazilian qualifier Thiago Seyboth Wild in straight sets at the Miami Open on Saturday as top ranked US men tumbled out of the tournament.Italy's Jannik Sinner, the Australian Open champion ranked third in the world, made a confident start to his bid in Miami with a 6-3, 6-4 victory over compatriot and qualifier Andrea Vavassori.
Read full NASCAR article on Yahoo Sports
Read all NASCAR articles