The comments by Euclid Tsakalotos were the clearest sign since the collapse of talks at the weekend that Greece still has room to offer some ground to lenders despite its hardline rhetoric against their demands. Athens could accept a deal only if it was sustainable and addressed debt, financing and investment issues, said Tsakalotos, the coordinator of the Greek negotiating team. "If you have that, then the Greek government will sign the deal," Tsakalotos said.