jurgen klopp 's seven-year stint at borussia dortmund will end on june 30 .
premier league clubs on alert after the shock news from germany .
klopp has denied suggestions he is exhausted and wants a break .
dortmund ceo hans-joachim watzke confirmed news in press conference .
the 47-year-old has been linked to arsenal and man city jobs .
klopp has won two league titles and the german cup in seven years there .
klopp : ` i believe that borussia dortmund actually needs a change '