According to British news site Telegraph, Austria is threatening to sabotage the agreement reached between Greece and FYROM on the name dispute signed on Sunday at Prespes.
As the site reports,

AEK Athens have clinched a spot in the final 32 knock out stage of the 2017/18 UEFA Europa League competition.

Austrian Finance Minister Hans Joerg Schelling voiced his belief today, that Europe would only slightly suffer if Greece exited the euro zone.