A California father says he simply wanted to spend an afternoon playing tennis with his children but instead found himself being questioned by park rangers who believed he was illegally teaching lessons without a permit.

Sam Dogen, a San Francisco father of two, told Fox News Digital he was practicing with his 6-year-old daughter and 9-year-old son at Golden Gate Heights Park after returning from a family trip to Hawaii.

“I took the kids out for what I thought would be a nice afternoon … to get over the jet lag, be outside in the sun and go play some tennis like we’ve done many, many times,” Dogen said.

About 20 minutes into their practice…

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