The young defender/midfielder played the full 90 minutes having finally recovered from a broken foot sustained in the European Under-21 Championships in May.
Chris Armstrong, who played an hour of another friendly against Peterborough United last week, also completed the full 90 minutes as he pushes for a first-team return after groin trouble.
The striker bagged the first goal in our 3-2 win with Neale Fenn and an own goal accounting for the other two.
Reserve team boss Chris Hughton said: "The big plusses, apart from another game for lads that needed games, was Chris Armstrong and Ledley King playing their first 90 minutes of the season and both came through well.
"Believe me, no-one feels the effects of injuries more than the players themselves.
"I think that Ledley, having done so well to get into the Under-21s set-up at the end of last season, would have been looking forward to getting involved with the first-team squad this season and staking a claim.
"Thanks to the injury it's all gone wrong but we would like to think that he will now have the opportunity to push on for the first team."
Hughton's reserve team are back in league action against Watford at St Albans FC on Wednesday.
Spurs: Kelly, Thelwell, Doherty, King, Piercy, Gower, Toner, Davies, Jackson, Armstrong, McEwen. Sub used: Fenn.
Ledley King returned to action for the first time in three months in a private friendly against Barnet this week.