Federer isn't a bad tennis player, but he should have never showed his football skills.
It's weird he's so bad with a football. From what I've seen, tennis players are usually good at jugling with their feet, they have great coordination. I've seen Rafa, Djok, Andy even Halep is great at it. And I'm pretty sure there are more that I can't remember right now. So I'm pretty surprised a player with such good footwork is bad at it.