Arsenal boss Arsene Wenger has confirmed that midfielder Alexis Sanchez will not feature against Chelsea in next month's FA Community Shield game.
The Chilean reached the very end of this summer's Copa America and will not be available before August 3, one day after Sunday's final against the Blues.
Danny Welbeck, Tomas Rosicky and goalkeeper David Ospina will also miss Arsenal's Barclays Asia Trophy in Singapore.
"Calum [Chambers] has decided to shorten his holiday and come back on Friday," Wenger told the club's official website.
"He didn't play in the under-21s and needs preparations.
"[Danny] Welbeck isn't completely recovered from the problem he had [at the end of last season]. He's not back in full training so he will stay behind.
"[Tomas] Rosicky will stay back because he got a small injury at his last game against Iceland with Czech Republic.
"[David] Ospina is on holiday until July 27 and Alexis [Sanchez] is on holiday until August 3.
"Serge Gnabry is on holiday after playing with the under-21s. He's back on July 20."