Spurs won 1-0 in Hong Kong thanks to Pape Matar Sarr's long-range strike.
The match marked the debuts of Viktor Gyokeres and Cristhian Mosquera.
Arteta reflected afterwards: "Really happy obviously to have them here, I think they're going to have a lot of value. You see this right away, as well as the energy and the quality that they're going to bring.
"It was a short one but at least that one is off now and when they play against Villarreal now, I'm sure it will be a bit different."
Teen Max Dowman again impressed and Arteta added: "I'm not surprised, he's been really impressive with what he's done again at his age, the way he has entered the matches and with that determination, that quality, that decisiveness I would say.
"The same with the other kids that played, so it was another exposure to them, which is not easy, especially at that age. They certainly have done so, so well and made a lot of people proud."