The French international, who has been blighted by injury during the past two campaigns, featured in the Gunners' 7-0 win over an Indonesia XI in Jakarta on Sunday.
"I'm very happy," Sagna told the club's official website. "Last year I missed pre-season so I was struggling a bit during the season.
"I'm looking forward to getting back to my best - that's my aim and after that we'll see."
Arsenal continue their tour with a match against Vietnam on Wednesday.