Serena Williams, Naomi Osaka Square Off in High Stakes Australian Open Semifinal

Serena Williams and Naomi Osaka are two of the biggest stars in women's tennis. Whose win would mean more in their semifinal match at the Australian Open?

Serena Williams takes on Naomi Osaka in a highly anticipated semi-final match at the Australian Open. Williams is in the midst of attempting to tie the all-time Grand Slams mark, while Osaka's stardom continues to rise. So, who is the showdown bigger for? Sports Illustrated host Robin Lundberg discussed with SI senior writer Jon Wertheim.