Amartey, 22 has been deployed as a defensive midfielder to replace Ngolo Kante, who he joined Chelsea early this summer.

He has features consistently for the English champions in that role, and his teammate King believes Amartey has filled in well.

"Daniel has filled in with happiness. He is young, still learning and has great potential," he said.

"He (Kanté) chose to play football somewhere else. It is normal. It was hard to lose him because probably no one in the league plays like him.

"But it is up to the coach how to replace him," he added.