German Chancellor Angela Merkel said on Sunday it would be possible to talk about changing the maturities of Greece's debt or reducing the interest Athens has to pay after the first successful review of the new bailout package to be negotiated.
"Greece has already been given relief. We had a voluntary haircut among the private creditors and we then extended maturities once and reduced interest rates," Ms. Merkel said in an interview with German public broadcaster ARD due to be broadcast later on Sunday.
"And we can now talk about such possibilities again ... Once the first successful review of the programme to be negotiated has been completed, then exactly this question will be discussed - not now, but then," she said.
Ms. Merkel stressed that a classic debt 'haircut' was out of the question as long as Greece remained a member of the euro zone: "That can happen outside a currency union but it can't happen in a currency union."
She said Finance Minister Wolfgang Schaeuble's suggestion that Greece could take a "time-out" from the euro zone had been considered but the euro zone had turned its back on the idea.
"The only option is to go down a common path with Greece, or to conjure up a chaotic situation because there would be no common decision among the finance ministers or the leaders. So the option was also on the table but we chose another option," Ms. Merkel said.