Greece will tumble back into deep recession this year and next, EU sources said Wednesday as Athens implements a tough third debt rescue hammered out with its international creditors.

The Greek economy, which crawled out of a six-year recession only in 2014, will shrink 2.3 percent in 2015 and another 1.3 percent in 2016, the sources said, as the authorities push through a bailout aimed at helping Athens stay in the eurozone.