Hello all just wanted to share a tip that might have been obvious to some but not to me until I all ready wasted 100's of gems.

So the 'x' to exit from arena is really close to the 'refresh' button in arena and it costs 5 gems and 15 gems in each arena (classic and 3vs3). Countless times I pressed the 'x' on my phone only for the refresh button to triger instead.

I literally just figured out to click on another section of the arena (defence, bazar, etc) and then click the x. it will still take you to the arena map with out risking those precious gems. I hope this helps others not waste gems. i was getting really frustrated and just figured this out.