Sunderland are reportedly close to signing Central Coast Mariners defender Nectarios Triantis, according to beIN Sports Australia.
The deal, said to be worth around £250,000 for the 20-year-old, could go through when the transfer window opens later this month.
Traintis is an Australia Under-20 international and made 22 A-League appearances for the Mariners this season. He was named among the substitutes in the A-League team of the season.