A man walks past an electronic stock indicator in Tokyo on June 24, 2015.

A man walks past an electronic stock indicator in Tokyo on June 24, 2015.

European and Asian markets declined Friday as a standoff between Greece and its international creditors threatened to drag into the weekend.

Chinese shares fell especially sharply, with the Shanghai composite index in mainland China off over 7%. Investors there expressed concerned that Beijing is not doing enough to help stimulate a slowing economy. In Japan, the Nikkei 225 index was down 0.3%.

Major indexes across Europe were trading down by around 1% ahead of the U.S. market open in New York.

U.S. stock futures traded flat after Wall Street stocks dropped on Friday.

It remains unclear whether Athens will be able to agree a deal with the International Monetary Fund, European Central Bank and European Commission over loan repayments ahead of a June 30 deadline. If a deal is not agreed, Greece may be forced out of the 19-nation euro-currency bloc.