Story By: Koen Berghuis, Sub Editor: Joseph Golder, Agency: Golders Video Credit: Golders/@JulianBrandt This is the moment Borussia Dortmund star Julian Brandt performs a daring backflip into the sea from the top of a yacht during a luxury holiday with Arsenal and Tottenham target Kai Havertz. Brandt, 23, is currently on holiday on the Spanish Balearic Island of…