Ben Turner's first Football League goal saw Coventry maintain their unbeaten start to the npower Championship campaign as midlands rivals Derby were beaten 2-1 at the Ricoh Arena.
The big defender headed the winner after 80 minutes to temporarily send the Sky Blues top of the table.
Dean Moxey had marked his return to the Derby starting line-up with a goal early in the second half to cancel out Lukas Jutkiewicz's first-half penalty.
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