Already after seven holes, Stenson was three under, but then came two bogeys before the day ended with a birdie.
Stenson is thus in joint 46th place after the first round, six strokes behind American leader Peter Malnati.
Henrik Stenson has played sparingly during the corona pandemic and has not been very successful once he has competed.
At best, he has been 21st and in both the major competitions, the PGA Championship and the US Open, he missed the cut.