ATHENS/BRUSSELS—Greece and its euro zone creditors reached a preliminary deal on Saturday on reforms Athens needs to roll out under its bailout program, a move that could pave the way for the country to leave the aid plan in August.
The agreement on a range of often politically sensitive measures—covering fiscal issues, energy and labor market reforms, bad loans and privatizations—could open up fresh loans and push Greece further along the path toward a return to full market financing.