Then 23-year-old Sabalenka was hampered by a thigh injury.
Now it was a convincing victory.
The zeroing of the first set, a so-called bagel, was the first thing Barty had experienced in four years.
- To be honest, I injured myself in the final in Stuttgart, I could not even move, I really wanted to get out of here.
I do not know how it happened but with the help of my team I recovered really well.
In four days, they made me feel better.
Somehow I stand here as champion in this tournament, says Sabalenka according to AP.
Four on the next world best list
The Belarusian broke Barty blankly to 5-4 in the third set and could then win the final serve game blankly.
She finished with a heavy straight backhand that Barty hit in the net.
It was Sabalenka's tenth WTA title, the first on gravel.
When the victory was over, world number seven Sabalenka took a couple of dance steps to celebrate and fired her biggest smile before the coach got a hug.
In next week's ranking, Sabalenka will reach personal best fourth place.