Ace is a tennis serve that is not touched by the receiver and wins the point.
The player that has the most aces in a career is the Croatian player Ivo Karlović (with 13,728 aces). Karlović has beaten the Croatian player Goran Ivanišević in the number of aces in October 2015.
One of the aces Karlović served has kept flying until it landed in a forest near a tennis hall in Sollentuna, Sweden! Many people searched for it but nobody found it. Therefore, I want your help to find the tennis ball that never came back. You only have the last recorded coordinates and of course a hint. If you find it please log the logbook in it so that I can see that you managed to catch it.
DO NOT PULL THE ROPE, JUST LOWER THE CACHE!
DRA INTE I REPET, HISSA BARA NER CACHEN!