Arsenal winger Bukayo Saka has been ruled out for "many weeks" hamstring injury, says manager Mikel Arteta.
"It's not looking good, he's going to be out for many weeks," he said in a press conference on Monday.
"I cannot be too specific because I do not know but it's going to be many weeks."
Asked about the blow of losing Saka, Arteta replied: "It's a huge one, he's a massive player for us.
"You have to see the impact he has on this team but it will be a good exercise for all of us to overcome another challenge, because we've had a lot in the season."
Saka limped off in the 24th minute at Selhurst Park and while Arsenal went on to win 5-1, the victory was marred by the blow to the England winger, who left the stadium on crutches.
It is not the first hamstring injury Saka has suffered this season. The winger limped off while on England duty during the October international break and was sidelined for a few weeks, missing Arsenal's 2-0 loss to Bournemouth.
Sterling also ruled out
The loss of Saka has been compounded by an injury sustained by Raheem Sterling in training last Friday.
Arteta confirmed the on-loan Chelsea winger will also be out for a while.
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Mikel Arteta says he is 'pretty worried' about Bukayo Saka after suffering a hamstring injury in Arsenal's match against Crystal Palace.
Bukayo Saka was seen leaving Selhurst Park on crutches after he suffered a hamstring injury in Arsenal's win at Crystal Palace
"He's going to be out for weeks, I believe. He needs some further testing. It's his knee, we will have to see in 24 hours."
Arsenal's upcoming fixtures
Ipswich (H) - Premier League - Friday December 27
Brentford (A) - Premier League - Wednesday January 1
Brighton (A) - Premier League - Saturday January 4, live on Sky Sports
Newcastle (H) - Carabao Cup semi-final first-leg - Tuesday January 7, live on Sky Sports
Man Utd (H) - FA Cup third-round - Sunday January 12
Tottenham (H) - Premier League - Wednesday January 15
Aston Villa (H) - Premier League - Saturday January 18, live on Sky Sports
Dinamo Zagreb (H) - Premier League - Wednesday January 22
Wolves (A) - Premier League - Saturday January 25
Girona (A) - Premier League - Wednesday January 29
Man City (H) - Premier League - Sunday February 2, live on Sky Sports
Newcastle (A) - Carabao Cup semi-final second leg - Wednesday February 5, live on Sky Sports
More to follow…
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