Wozniacki beat second-seeded
It will be Wozniacki's second final at Stuttgart after she lost in 2011 to Germany's
The fourth-seeded Dane needed almost three hours to prevail over Halep, winning four games in a row in the third set to go 5-1 ahead. After missing three match points and being broken while serving for the match, Wozniacki broke the Romanian again to close out the win.
Despite the loss, Halep will move up to No. 2 when the world rankings are updated on Monday, jumping over
Kerber has a 5-4 record against Wozniacki, winning in the Stuttgart second round in 2012. Kerber won her fourth
The top-seeded Japanese will face Spaniard
Klizan had won their only previous match at last year's
Nishikori won the first five games of the match and saved all six of Klizan's break points.
The 25-year-old Nishikori is seeking to add to his eight career titles.
Nishikori had another strong start by claiming 21 of the first 27 points with a complete mix of winning shots, including a beautiful lob that fell on the line.
Nishikori closed out the first set with a slicing backhand approach shot and broke Klizan early in the second set to win in 1 hour, 17 minutes.
Andujar hit 32 winners to Ferrer's 19 and finished off the upset with a drop shot that Ferrer couldn't reach. Andujar, ranked 66th, had not taken a set from the eighth-ranked Ferrer in three previous losses.
Sunday's finale was set up when Garcia-Lopez lost his serve only once in beating