Dylan Frittelli has become the latest player to withdraw from a PGA Tour event after testing positive for coronavirus.
The South African, who missed the cut at the Travelers Championship in Connecticut, was tested ahead of this week's tournament in Detroit.
Frittelli says he was surprised because he didn't display any symptoms.
Dustin Johnson finished up on 19 under to claim a one shot win over Kevin Streelman at the Travelers Championship.
World number one Rory McILroy finished just outside the top 10 on 13 under, while Shane Lowry ended up on 4 under.
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