This icon looks like a diagonal soccer field. The icon overall is a diagonally oriented rectangle with two small rectangles on each short side and a line bisecting the rectangle with a small circle at its midpoint.
This is a Stadium icon. We've made it in iOS style
, first introduced in iOS version 7 and supported in all later releases up until now (at least iOS 11). This style is based on thin two-pixel lines and is optimized for 50x50 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 13,900 icons, all in the same style and quality.