Arsenal midfielder Thomas Partey will need a scan on an ankle injury he sustained during Sunday's 2-1 pre-season defeat by Chelsea.
Partey, 28, limped off during the first half following a tackle by Blues midfielder Ruben Loftus-Cheek.
"At the moment it's not looking good because he was in pain and he could not continue which, for Thomas, is pretty unusual," said manager Mikel Arteta.
Arsenal travel to Brentford in their Premier League opener on 13 August.
And Arteta has ruled out selling midfielder Granit Xhaka before the transfer window shuts at the end of this month.
The Switzerland international, who scored the equaliser against Chelsea in his first appearance of pre-season, has been heavily linked with a move to Roma.
"Granit is going to stay with us," said Arteta. "He is a player who we rate and value so much. He's a key member of our squad.
"He wanted to play today and I think it's clear commitment from his side that he wants to be here."
Tammy Abraham scored the winner for Chelsea at Emirates Stadium, pouncing on Hector Bellerin's loose pass before firing home from just inside the area with 18 minutes left.
Xhaka's header had brought Arsenal level just three minutes earlier, cancelling out Kai Havertz's first-half opener.
Arteta's side thought they had levelled late on when Joe Willock's shot hit the underside of the bar and appeared to bounce over the line, but goalline technology was not in use and the goal was not given.
Summer signings Ben White, Albert Sambi Lokonga and Nuno Tavares all came on as substitutes for their home debuts.
England international White, a £50m capture from Brighton, was quickly into the action, doing well to clear Hakim Ziyech's effort off the line early in the second half.
More than 20,000 fans attended the game following the relaxation of UK government coronavirus restrictions, the biggest attendance at the ground since March 2020.
Latest Stories
-
Ghanaians must assess the quality of political leaders presented – Asah-Asante
7 mins -
Ashanti Regional Minister demands withdrawal of ‘fraudulent ECG bills’ sent to his residence
26 mins -
Delta Air Lines deploys new Airbus on Accra-New York route
32 mins -
PPDC spearheads Africa’s AI development at DRIF24 forum
40 mins -
Ripoti App launched to empower journalists, others to tackle digital rights violations in Africa
56 mins -
Ground-breaking health investment charter to tackle worker shortages in Africa
1 hour -
From Mortuary to Matrimony: Feature on how couple’s love journey brewed at the morgue airs on Joy Prime
1 hour -
Ghana’s LPG prices rank among the highest globally – LPG Marketers Association
1 hour -
Filth Exhibition: Residents near Korle Gonno bear the brunt of nationwide filth
2 hours -
We’ve not selected NPP members as returning officers – EC replies Mahama
2 hours -
We’ll not honour any invitation – ECG tells Ashanti Regional Minister
2 hours -
Dumsor vigil to hit Accra
2 hours -
Supreme Court rule for dual citizens to hold other key positions laudable – Kwaku Asare
3 hours -
‘No one is above the law’ – CAF president on match-fixing allegations against Samuel Eto’o
3 hours -
Manchester City thrash Brighton to go second in table
3 hours