Wozniacki, sixth-seeded, was defeated in his six presences in the finals this year.
Wozniacki eliminated Stephens in a tidy 83 minutes at Aviva Centre.
On Sunday in Toronto, Svitolina remained ideal in finals on the year and further entrenched herself as an elite player in the current landscape with a 6-4, 6-0 win in the Rogers Cup final over Caroline Wozniacki.
Wet weather hampered the proceedings at the WTA Tour Premier 5 event for a second straight day. Rogers Cup champion in 2010, Wozniacki had an aggressive gameplan from the start, racing out to a 5-1 lead and then overcoming a brief wobble before wrapping up the first set.
Svitolina's resolute defence was key to her victory over Wozniacki, who was guilty of increasingly frequent unforced errors as she tried in vain to make an impact.
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Svitolina will go into the final against Wozniacki with plenty of confidence having a 2-0 career record against her. She won the final eight games of the match as Wozniacki struggled with her serve throughout.
"Today, I was very focused and I learned a lot from that experience, which of course was very painful".
Wozniacki, a former world No. 1, is 0-5 in final appearances this season. The finalist is to take home US$243,920. "I'm just very happy that it's finished - and with a title, it's even more special". Her ranking has plummeted to No. 934 due to her extended absence. But Federer made a decision to play and now has a chance to add to a tally that includes Australian Open and Wimbledon titles this year. "I'm just playing better". Wozniacki, who spent only 77 minutes on court in the round of sixteen, has generally been sharp this season, often advancing through the early stages of the tournaments that she has entered. I have many tournaments ahead.
The 36-year-old has his longest winning streak since 2012.
For the victory at the "Rogers Cup" Svitolina competed with the ex-first racket of the world Caroline Wozniacki. This is a quick turnaround that will really test the 22-year-old.
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