Austrian Dominic Thiem won the ATP event in Stuttgart on Monday after rain caused the grasscourt final against German Philipp Kohlschreiber to be held over.
Kohlschreiber had been leading Thiem 3-2 in a first-set tiebreaker on Sunday when play was halted for the day.
But the Austrian world number seven upped his game Monday, eventually running out a 6-7 (2/7), 6-4, 6-4 winner.
Thiem, who moved into the ATP top 10 last week after a French Open semi-final performance, had already claimed three titles in 2016 -- winning Buenos Aires, Acapulco and Nice.
The 22-year-old, who saved two match points as he knocked out Roger Federer in the quarterfinals, was successful in his bid to become the first man this season to claim trophies on three different surfaces (clay, hard court and now grass).