Grant Thornton Invitational second-round play from Tiburon GC in Naples, Fla. Alternate shot is the Day 2 format for 16 mixed duos of LPGA and PGA stars, including Lexi Thompson/Wyndham Clark; Brooke Henderson/Corey Conners; Lydia Ko/Jason Day; Nelly Korda/Denny McCarthy; Angel Yin/Tom Hoge; Lilia Vu/Tiny Finau; and Jennifer Kupcho/Chris Gotterup.