Reiss Nelson’s late goal sealed the hosts’ win at their London Colney training ground, where Mathieu Debuchy and Carl Jenkinson both featured for Arsenal.
Striker Sanogo, who has not made a first-team appearance this season and has not featured at all for Arsenal since 2014, scored in the first half after Spurs’ Joe Pritchard had given the ball away.
Nelson netted with two minutes remaining after being set up by Donyell Malen.