Arsenal will be without winger Bukayo Saka for several weeks after he picked up another hamstring injury, manager Mikel Arteta confirmed Friday ahead of the Premier League clash with Liverpool.

Sunday’s match at Anfield is an early test between title contenders, but the Gunners are hampered by injuries to key players, including captain Martin Odegaard. The midfielder injured his shoulder during Arsenal’s 5-0 win over Leeds last weekend.

“He hasn’t trained yet, and if he does it will be tomorrow,” Arteta told reporters. “He’s doing everything possible, we’re doing everything possible to make him available, but we’ll have to wait and see.” Odegaard was also called up this week by Norway for their upcoming matches.

Saka, who was forced off during the Leeds game, previously missed over three months last season after hamstring surgery. Arteta stressed that surgery will not be required this time, saying the problem is less serious and affects the other leg.

Meanwhile, forward Kai Havertz faces a long spell on the sidelines after undergoing knee surgery Thursday following an injury sustained in the season opener against Manchester United.

“I think it will be weeks, but I don’t know how many months,” Arteta said. “We’ve lost another big player for many weeks, but surgery was the right option.” Havertz, who also struggled with injuries last season, shared on social media: “Small setback, thanks to the medical team for all the care and attention. Back soon.”

Arsenal signed Eberechi Eze from Crystal Palace to strengthen the squad after Havertz’s latest setback. The Gunners finished second to Liverpool last season.