Asked at a press conference about the 23-year-old England international's condition, Arteta said: "It is not looking good. He will be out for many weeks."
Mikel Arteta said on Tuesday winning the League Cup could be a launchpad for more silverware as he celebrates five years in charge at Arsenal this week.
Bukayo Saka's double fired Arsenal a step closer to the Champions League last 16 as the England forward inspired a 3-0 win against Monaco on Wednesday.
Arteta had demanded a dynamic display from his team ahead of their trip to the Jose Alvalade stadium and they responded in style.
Pedro Neto dealt a fresh blow to spluttering Arsenal's Premier League title challenge as the Chelsea winger's superb strike rescued a 1-1 draw in the London derby on Sunday.
Saturday's 2-0 loss at Bournemouth brought Arsenal's unbeaten start to the league season to a shuddering halt.
Arteta, who worked as Guardiola's assistant at City before becoming Arsenal boss, said the controversy would not get in the way of his personal relationship with his fellow Spaniard.
Mikel Arteta stood by Arsenal's defensive tactics in their explosive Premier League clash with Manchester City, saying he would have been "thick" not to learn from previous clashes.
Mikel Arteta saluted Arsenal's hunger as the gritty Gunners ignored the absence of Declan Rice and Martin Odegaard to clinch an "ugly" 1-0 win at bitter rivals Tottenham on Sunday.
Asked at a press conference about the 23-year-old England international's condition, Arteta said: "It is not looking good. He will be out for many weeks."
Mikel Arteta said on Tuesday winning the League Cup could be a launchpad for more silverware as he celebrates five years in charge at Arsenal this week.
Bukayo Saka's double fired Arsenal a step closer to the Champions League last 16 as the England forward inspired a 3-0 win against Monaco on Wednesday.
Arteta had demanded a dynamic display from his team ahead of their trip to the Jose Alvalade stadium and they responded in style.
Pedro Neto dealt a fresh blow to spluttering Arsenal's Premier League title challenge as the Chelsea winger's superb strike rescued a 1-1 draw in the London derby on Sunday.
Saturday's 2-0 loss at Bournemouth brought Arsenal's unbeaten start to the league season to a shuddering halt.
Arteta, who worked as Guardiola's assistant at City before becoming Arsenal boss, said the controversy would not get in the way of his personal relationship with his fellow Spaniard.
Mikel Arteta stood by Arsenal's defensive tactics in their explosive Premier League clash with Manchester City, saying he would have been "thick" not to learn from previous clashes.
Mikel Arteta saluted Arsenal's hunger as the gritty Gunners ignored the absence of Declan Rice and Martin Odegaard to clinch an "ugly" 1-0 win at bitter rivals Tottenham on Sunday.
Arsenal boss Mikel Arteta refused to rule captain Martin Odegaard out of Sunday's north London derby at Tottenham despite fears the key midfielder could be sidelined for weeks.
