Gauff, 18, Trevisan, 28, Reach 1st Slam Semifinal in ParisGauff, 18, Trevisan, 28, Reach 1st Slam Semifinal in ParisCoco Gauff has reached her first Grand Slam semifinal at age 18 after eliminating 2017 U.S. Open champion Sloane Stephens at the French OpenAssociated PressAssociated Press