Sebastian Korda of the U.S. celebrates after defeating Daniil Medvedev of Russia in their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday. (AP Photo/Aaron Favila)
Elena Rybakina, left, of Kazakhstan, left, is congratulated by Iga Swiatek of Poland after their fourth round match at the Australian Open tennis championship in Melbourne, Australia, Sunday. (AP Photo/Mark Baker)
MELBOURNE, Australia — It all came so seemingly easy for Iga Swiatek last season — two Grand Slam trophies, eight titles overall, a 37-match winning streak, a lengthy stay at No. 1 in the rankings.