Spurs won 1-0 in Hong Kong thanks to Pape Matar Sarr's strike.
Merino told arsenal.com afterwards: “It’s not the result we wanted. Obviously, winning is a priority for us, but in pre-season, there are other things that have a lot of value, like getting fit, keeping that connection with the fans here in this amazing city.
“We adapted quickly to the pitch, to the opponent, I think we dominated most of the game. The result is obviously the worst part, but we have to take the positives.
“Obviously, this feeling is going to be the gasoline for the season to keep growing, keep learning and hopefully go upwards.”
Arsenal ends their Asian tour with two wins and a defeat.
Merino also said: "The support has been amazing throughout the whole tour.
"Thank you very much to the whole fan base, because I know it's hard for them to support us during the season, sometimes with times that are not ideal for them. But thank you very much because it was lovely."