FC Seoul manager Kim Gi-dong is demanding better from Jesse Lingard.
The former Manchester United has been used off the bench so far since his arrival.
Kim said after victory over Jeju: "Even though he came on as a substitute, he didn't work hard and avoided tussle.
"The name value has no meaning on the pitch. I will tell him this exactly."
Lingard joined FC Seoul after being released by Nottingham Forest before the end of last season.
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