Australian Open 2021: Serena Williams, Naomi Osaka set for semifinal clash; predictions, pick, rivalry history | CBS Sports Headlines Australian Open 2021: Serena Williams, Naomi Osaka set for semifinal clash; predictions, pick, rivalry history Williams and Osaka will play for the first time in a Grand Slam since the 2018 … Continue reading Australian Open 2021: Serena Williams, Naomi Osaka set for semifinal clash; predictions, pick, rivalry history