Ideas to create privacy

[Gardenprivacyhelp]

Hi all, wondering if anyone could give suggestions of what I could put here to create some privacy from the upstairs window of next door? Ideally something that doesn’t take up too much space on the grass as I’ve got three wannabe footballers. TIA

Pleached trees. Expensive though.

There's a Japanese flowering cherry that is a column rather than a spreading tree, I planted one last year. It's width is only six feet, stratigically placed it could work.

Trellis and grow a Clematis Montana up it?

You could put a sun shade sail. Something like this