Sanchez scored 30 goals in all competitions last season.
Arsenal will face Bayern Munich and Chelsea during their trip to China.
Bellerin reportedly ruled out by Barca brain trust due to price tag and certain physical and technical issues.
The Gunners have seen offers of £35m and £45m for the Monaco star rejected.
Ozil has only a year left in his current contract.
The Gunners skipper is extremely confident the Chilean is going nowhere.
Arsenal midfielder will not sign a new contract according to latest reports.
The Spanish side admit however things could still change after recent developments.
Arsene Wenger believes French striker adds "great value to the squad" and is determined to keep the forward.
Liverpool, Real Madrid and PSG are also interested to sign Mbappe.
The 67-year-old is hopeful of a contract extension for the Chilean.
Blues had been considering a move for Dembele during January transfer window.
Mathieu Debuchy and Carl Jenkinson also omitted for matches in Australia and China.
Monaco have already rejected two offers for the 21-year-old.
Lacazette joined Arsenal earlier this week in a club record €60m fee.
Sanchez's Arsenal future is still uncertain with the 2017/18 season fast approaching.
The 19-year-old signed a three-year deal with the Bundesliga side.
Spain international has held two meetings with Arsene Wenger demanding permission to return to Barca.
Wages of £90,000-a-week have been agreed a deal is some way from being finalised.
Lacazette joined Arsenal for a club-record fee of €60m from French club Lyon.
Defensive midfielder continues to be linked with the Gunners but agent says no contact has been made.
Mahrez scored only six goals in the last campaign.