Yeovil boss Johnson pleased with deal for Everton's Duffy
Johnson admits the 21-year-old defender will only improve with more minutes under his belt.
"He did very well up at Bolton and he did well against Leicester because he's a solid player and a good defender," Johnson said.
"He hasn't had many games so it might take him two to three to get a bit sharper, but he's one we want winning headers in both penalty areas and he can."
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