Live updates: Australian Open tennis, day two at Melbourne Park

ROD LAVER ARENA Karolina Pliskova (CZE) [2] defeated Kristina Mladenovic (FRA) 6-1 7-5Donna Vekic (CRO) [19] vs Maria Sharapova (RUS) 6-3 6-4Rafael Nadal (ESP) [1] vs Hugo Dellien (BOL) 6-2 6-3 6-0From 7pm: Daniil Medvedev…