Is it strange my boyfriend is going to play tennis over lunch with a female coworker?

He says me and the new hire are going to play tennis during lunch tomorrow and one of the assistants are coming to watch. He isn’t normally active during the day usually more morning or evening workout. I’m more of a play sports than go to the gym person so usually try to get him to play sports with me. Which is normally rejected. Maybe that’s why I find this odd. Also, he’s not one to do activities outside of happy hours with coworkers.
It’s strange regardless
Not strange
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Is it strange my boyfriend is going to play tennis over lunch with a female coworker?
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