Arsenal manager Arsene Wenger has confirmed that he will very cautious with midfielder Aaron Ramsey.
The Wales international is still recovering from the hamstring injury suffered against Liverpool in the opening game of this season's English Premier League.
Striker Olivier Giroud is however expected to start when the Gunners host Chelsea later on today.
"We have no new injuries," the Frenchman said.
"Olivier Giroud has a test to see if he can be involved [on Saturday], he had a good training session [on Thursday] so he is really the only one who could come back.
"Aaron Ramsey is still struggling with his hamstring and I don't think that he will be available for our next game against Basel or at Burnley, so before the break he will not be available.
"He is not completely free in his mind yet to push completely, so we stop him every time when he has a little pain. He is in the last days of his rehab and as long as he is not completely comfortable, we do not push him.
"We had a few disappointments because he was close to joining again and every time he is not completely ready. Not far, but we have to be cautious with him."