It wasn't watch where he's come from.
He's made a late run from wide off the right wing, running past Esse who half attempts to track him
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And at the point the ball is crossed he is still the widest Derby player, with Dasilva, Morris and Esse all between Kitching and Diaz.
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Even when the ball is in flight, Dasilva and Morris are between Kitching and Diaz, as Diaz has made the late run from wide, Esse has stopped tracking him
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Kitching is the one defender that tracks the flight of the ball as Diaz arrives on the end of the cross.
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He was never Kitchings man.