I was looking at historical imagery of World Cup venues through Google Earth. I went back to 2010 and FNB Stadium which was called Soccer City at the time (in Johannesburg). This is the picture at June 18 of that year: As you can see there is a huge carpet-like thing on the pitch and a little of grass is seen at the left side. The thing isn't there at the previous and next dates. I then checked Wikipedia article of the 2010 FIFA World Cup, but...
Originally asked by Snack Exchange on Stack Exchange (sports) (CC BY-SA 4.0).
