ATHENS, Jan. 15 (Xinhua) -- Greek Piraeus Bank CEO AnthimosThomopoulos submitted his resignation on Friday.

　　Thomopoulos, according to media reports, was lately underpressure from Greece's bank rescue fund, the Hellenic FinancialStability Fund (HFSF), to step down.

　　This came after Piraeus Bank, the country's biggest commercialbank, struggled to complete successfully the process of raisingfresh capital from private investors in late 2015.

　　After more than 3 billion euros (3.28 billion U.S. dollars) incapital injections from the HFSF, the Fund now holds a 25 percentof shares in Piraeus, which is the double compared to the otherthree major Greek banks.

　　Piraeus also faces problems of non-performing loans which hasbeen a key issue in Greece's negotiations with internationallenders in recent months. Enditem