Take context from the input text and decide on the accurate relationship between 'Eurogroup' and 'Jean-Claude Juncker' from the options provided.
Options: chairperson, product/material produced, employer, chief executive officer

With the ramifications still unclear and some analysts putting the chances of a "Grexit" at "very high", European Commission head Jean-Claude Juncker was to hold a teleconference on Monday morning with European Central Bank chief Mario Draghi, Tusk and Eurogroup head Jeroen Dijsselbloem.
chairperson