>> it's going to be an all williams final at the australia open, serena and venus face off for a grand slam final. andy scholes joins us, hi. >> reporter: both have been so good for so long. this actually will be the first time the two square off in a grand slam final in wimbledon since 2009. that was the last time venus made it to a grand slam final. serena has gotten the better of venus, winning 16. one more final win for serena and she'll pass steffi graff for the most grand slams in the modern era. she's excited to be playing her sister in saturday's final. >> she's my toughest opponent, no one has beaten me as much as venus has. she has a pretty good record against me. we have a good record against each other. so it's -- you know, i just feel like no matter what happens, we've won. >> reporter: back to the future