Offshore investors in Evergrande say they are yet to receive an $83.5m interest payment that was due on Thursday.
The property group has not made a statement on the repayment, but has a 30-day grace period before any failure to pay officially results in a default.
The company faces other deadlines, including a $45m payment due next Wednesday on a bond maturing in 2024.
It has a total of around $20bn in outstanding debt on international markets.
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