Asif Kapadia and Joe Sabia’s sports documentary captures plenty of tears and even a little tennis, but Roger Federer deserves a more probing portrait. In his two previous sports documentaries, “Senna” ...

Blink and you would have missed it. But the tennis and K-pop worlds collided on Roger Federer’s Instagram, of all places, as he posted a picture of himself with the K-pop stars Blackpink in Paris. “My ...