"It was my second full 90 minutes. I was a bit tired out there, but that is what I expect at the moment," he told spurs.co.uk
"It was nice to get through though."
King is now looking to prove his form and fitness to manager Glenn Hoddle in a bid to receive a first team recall.
"It would be nice. It's been a long time and I'm itching to get back in there with the boys," he added.
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