Arsenal manager Arsene Wenger says Mohamed Elneny was substituted before half-time of Wednesday's EFL Cup defeat to Southampton because he was struggling with illness.
Elneny was withdrawn in place of Granit Xhaka after 43 minutes of the quarter-final contest at Emirates Stadium, which Saints won 2-0 thanks to goals from Jordy Clasie and Ryan Bertrand.
"He was sick before the game. He decided he felt well enough," Wenger said.
"I could see after five or 10 minutes that he was not right. He has no medical injury problem, but he has diarrhea or a stomach problem."
"Cazorla I don't know, honestly," he added. "It's just inflammation. It can go in two days, two weeks - I don't know.
"He has no setback, the inflammation is just still here. At the moment, it's stable."
