The other Magpies claimed a straightforward victory at Meadow Lane as a penalty from Callum Roberts and a strike from Elias Sorensen left Notts at the bottom of the EFL Trophy Group G.
“I am disappointed,” Kewell told the Nottingham Post following the game, in which he made widescale changes.
“You get asked a lot of questions by players when you have a big squad and the only thing you say to them is work hard and when you get your opportunity make sure you shine.
“We all know match fitness and touch may be a little bit off, but that is when you work extra.
“But I didn’t see anything really. Sam Osborne was excellent and Tyreece (Kennedy-Williams) was good at right-back even though he is a left footer. But other than that I was disappointed.”
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