"She's beat some really good players and this was probably the strongest draw the ASB Classic has had in the women's game here".
Andreescu won 6-7, 6-1, 6-3 after having shocked the top seed Caroline Wozniacki in her second round match.
After being broken in the opening game of the second set against Venus, Andreescu reeled off 11 straight games to take control of the match. "But for me it was always harder to hit against people like her because I don't really know what's coming next", said Osaka. "And I think I've been doing that this whole week and I'm beyond grateful right now".
Defending champion Goerges moved one step closer to back-to-back Auckland titles after Friday's quarter-final matches.
"For her to make wins like that at such a young age, that's impressive", says Tylek, who is the same age as Andreescu and grew up playing tennis with her.
But if there is one thing she is not lacking in it's belief.
The match was a topsy-turvy affair, with the Canadian's impressive variety and depth on her groundstrokes giving the 37-year-old Williams - who is over twice Andreescu's age - everything she could handle.More news: Nasa shows first photo of distant world from New Horizons probe
The German, who was also runner-up to Sloane Stephens here in 2016, has also become the first ever player to reach the Auckland final three times.
"I've actually had this cough for three weeks now so I'm used to it", Andreescu said.
"I guess Auckland brings out the best in me". Today she didn't serve as well as other matches I've seen her play.
Goerges, ranked 14th in the world, raced out of the blocks, thumping winners and making few errors as she stormed through the first set.
Goerges clinched the second set in 45 minutes with a pivotal break in the 11th game, then took the deciding third set in only 23 minutes as Andreescu exhausted in her eighth match at the tournament.
The US$250,000 WTA Tour event is a warmup for the first Grand Slam of the season.