Net with a vertically adjustable upper edge for a playing area and a method for adjusting the height of the upper edge

A net for a playing area, the net comprising:

• a lower fixed net part and
• an upper vertically adjustable net part, wherein both the lower net part and the upper net part have an extension across a playing area,
• posts placed at the sides of the playing area, wherein ends of the lower net part and upper net part are fastened to the posts, whereby the lower net part is fixedly mounted at a lower part of said posts,
• wherein the upper net part is doubly folded along a line along a longitudinal direction of the upper net part, so that a fold is formed along said line and so that the upper net part exhibits a downwardly-hanging net portion on each side of the fold,
• wherein the posts comprise a vertically adjustable upper part to which the ends of the upper net part are fastened, and wherein the fold of the upper net part is arranged across the lower net part in a longitudinal direction of the lower net part with a net portion hanging down on each side of the lower net part so that the upper vertically adjustable net part, at least between a lower part of hanging net portions of the vertically adjustable net, encloses an upper part of the lower net part.