Chris Coleman believes Ashley Fletcher will be an asset to Sunderland, but only if the striker's team-mates play to his strengths.
Fletcher has often been isolated up front as the Black Cats have struggled and the 22-year-old has been criticised by a section of the Sunderland faithful.
The forward has failed to find the net in his five appearances for Coleman's team following his loan switch from Middlesbrough in January.
He only scored once for Boro in 16 Championship appearances after moving to Teesside from West Ham United for £6.5million last summer.
Coleman said of the former Manchester United trainee: "I think people look at Fletcher, 6ft 4, and they expect him to be winning aerial duels.
"He will get better at that when he's more experienced, and he knows he has to get better at using his body. He has a super attitude, but he is a bit naive."
Sunderland are rooted to the foot of the Championship table after winning only five of their first 35 games of the campaign.
They are 1/1000 to be relegated again after dropping out of the Premier League last season and face promotion-chasing Aston Villa on Tuesday. Steve Bruce's team are 11/10 to return to the top-flight this term and 6/5 to beat Sunderland at the Stadium of Light.
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