One day ahead of Greek Prime Minister Antonis Samaras's two-day visit to Berlin, German Chancellor Angela Merkel on Thursday hailed his administration's efforts to contain the nation's deficits.

However, the Wall Street Journal reports, Merkel warned that German financial aid will only be given to those countries that undertake efforts to resolve the sovereign debt crisis.

“Greece has implemented changes over the past years which are absolutely remarkable,” Merkel was quoted as saying during a business conference in Berlin.

“Who would have thought that Greece will post a primary budget surplus this year?” she added.