The German will meet Italian qualifier and world No.100 Camila Giorgi, who upset Poland's former world No.2 Agnieszka Radwanska 6-1, 6-2. She is guaranteed to break into the top 50 rankings for the first time on Monday.
The 2016 Australian Open champion is in superb form going into this year's event, having also won all four singles at the Hopman Cup, but knows she faces a big test against Barty on Saturday.
The Italian looked incredibly focused as she drilled 33 winners to 29 unforced errors and more self-assured in controlling her second deliveries.
Former world number one Angelique Kerber maintained her flawless record in 2018 as she saw off Camila Giorgi in straight sets to reach the Sydney International final.
Eliza Dushku Recounts Sexual Assault Experience on True Lies
I guess I'll have to get a lawyer and file a lawsuit against her for defamation and slander". This is just insane . "I think this is kind of a great moment in history.
Former world number one Kerber fell out of the top 20 last year but has made a strong start to the year ahead of next week's Australian Open with victories over Lucie Safarova and Venus Williams this week. "I was working hard in the last few weeks", Kerber said.
It's just the beginning of the year.
"We have set up a ideal platform for me to work with this year to try and go deep in tournaments, whether it's in Australia or in Europe or in the States. I'm trying to be aggressive and play like I did the year before last".
"I think it's unbelievable for Sydney and for Australian tennis - we're gonna have an Aussie in the final, which is awesome", Barty said after her win at the Ken Rosewall Arena.
How to Watch Eagles-Falcons NFL Divisional Playoff Game Live Stream Online
Considering that the Rams were averaging close to 30 points per game during the regular season , this is a pretty impressive feat. The Titans upset last weekend made a few believers (or wishful thinkers) that they could do the same traveling to Foxboro.
Barty overcame compatriot Daria Gavrilova in three sets, coming back from a set down to win 3-6 6-4 6-2.
"I shot myself in the foot with my serving in the first and didn't give myself an opportunity to be dominant on service games", Barty said.
Italian fourth seed Fabio Fognini set up a semi-final against qualifier Daniil Medvedev following a 7-6 (7-4), 6-7 (7-4), 6-2 marathon against Frenchman Adrian Mannarino.
Mertens will play Mihaela Buzarnescu of Romania, who has reached her first WTA final.
Iran rules out any change to nuclear accord
The White House announced today that President Trump will waive nuclear-related sanctions against Iran. They were speaking following a meeting with Iran's foreign minister, Javad Zarif .
Meanwhile, Juan Martin del Potro kept his Australian Open preparations on track with a 7-6 (4), 6-3 win over Russia's Karen Khachanov in the Auckland Classic on Thursday, setting up a semifinal meeting with David Ferrer.