That's where Svitolina was Friday night in her quarterfinal match against Kiki Bertens and she rallied to win the first set and the match.
A run of three consecutive breaks at the start of the second was halted by Stephens, who will defend her US Open title later this month, to move 3-1 ahead.
The Romanian broke Barty in the opening game and broke again for a 4-1 lead en route to taking the first set.
The No 3 seed progressed to her third final of 2018, which will be a re-match of her French Open clash with Halep in June.
The 26-year-old Halep battled through a hard first set, then easily won the second in a rematch of last year's quarter-final contest with Garcia which was also won by the Romanian. I played some slices.
"I think I got better today".
"She was striking the ball and everything was going in for her".
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"I thought I played well, I thought she played well, " Stephens said.
"I think I was little bit, I don't know, not there 100 per cent", said Svitolina.
"Obviously I'm sad I lost, but losing to the number one player isn't too bad".
"I feel like my return is growing up, I have more confidence", added Halep.
Barty will play the Romanian for the first time after dispatching Kiki Bertens 6-3 6-1 in less than an hour to extend her flawless record over the Dutchwoman to two matches.
However, with her fourth match point, Halep produced an ace down the middle to settle a gruelling encounter.
"That's a great thing for me". Her week included a three hour seven minute win over Anastasia Pavlyuchenkova that was played over two days. In 2013, she reached the doubles final of three grand slam tournaments with partner Casey Dellacqua. "Yeah, it's disappointing, but I think this will help me moving forward, getting ready to go into [Cincinnati] and the U.S. Open". The Ukrainian even got a service break to close the gap to 5-3, but Stephens broke right back to take the set.
Bertens fell short of posting a third straight win over a seeded player after ousting Karolina Pliskova and Petra Kvitova in the last two rounds.