Arsenal are optimistic Oleksandr Zinchenko will return for Friday's home match against Southampton after he missed their draw at West Ham through injury.
The 26-year-old was left out of the squad at the London Stadium because of a tight groin, but the injury is not thought to be serious.
Kieran Tierney played in his place at West Ham. After letting a 2-0 lead slip for the second match in a row, Mikel Arteta's league leaders will look to bounce back against the Premier League's bottom club on Friday night.
Arsenal are offering support to Bukayo Saka after the forward was subjected to abuse online following his penalty miss in Sunday's draw.
The club are working with technology experts and social media firms to identify the culprits.
Meanwhile, Arsenal have offered Reiss Nelson a new contract, with his deal expiring at the end of the season.
The forward, 23, wants to stay at the club he joined as a nine-year-old despite his bit-part role under Arteta, and it is understood he has been offered an increase on his £35,000-a-week wages.
Aston Villa, Fulham, West Ham, Brighton and AC Milan are interested in signing Nelson this summer.