Serena offers tennis lessons to Ciara and Russell Wilson

Shouldn't all tennis be played on courts situated on picturesque hills? (Answer: Yes, and/or by the sea.) Ciara, presently expecting her first child, recently took out her racquet for a sunny forehand drill.

The entertainer and husband Russell Wilson of the Seattle Seahawks—shirtless behind her and perhaps awaiting his own go at the drill—found that a certain celebrity friend will gladly give them instruction.

That would be Serena Williams, who was sad to miss their wedding last summer since she was winning the Wimbledon singles and doubles championships.

This fact remains: You just never truly know who Serena is going to grace with her presence on a tennis court.

Keep watching out, world. More everyday sightings are bound to crop up soon enough—and you best have watched to the end of Ciara's tweeted clip to see the couple's big, gorgeous pup.

Follow Jon on Twitter @jonscott9.