Petra Kvitova collected her second WTA Tour title of the year after winning a topsy-turvy final at the Pan Pacific Open in Japan.
The Czech, seeded seventh for the tournament, beat Angelique Kerber of Germany 6-2 0-6 6-3 in a fluctuating contest that lasted 100 minutes.
The 2011 Wimbledon champion broke twice to secure the opening set before losing six straight games as the No 5 seed required just 25 minutes to level matters and take the match into a decider.
However, Kvitova quickly re-established her control by taking the opening four games of the final set - and for the loss of just six points.
Kerber recovered one of the two breaks in game five and also staved off two match points on her own serve in the eighth when her 23-year-old opponent led 40-15.
The 25-year-old Kerber then failed to take advantage of a break point in the next game before Kvitova finally sealed victory on her fourth match point with a blistering crosscourt forehand.
And a delighted champion told the Tokyo crowd: "I really want to qualify for the end of season championships but I want to enjoy this feeling first.
"Angie came back at me but I tried to stay focused and it's amazing to win such a big tournament."
It was Kvitova's first title success since Dubai in February.