The Ghanaian, who has battled fitness setbacks on numerous occasions during his Gunners spell, damaged his right thigh.
Arsenal manager Mikel Arteta remains uncertain about the nature of Thomas Partey’s injury ahead of their Premier League game against Brighton on Saturday.
The Ghanaian, who has battled fitness setbacks on numerous occasions during his Gunners spell, damaged his right thigh.
"But he has a significant injury and we’ll have to keep assessing him, but he will be out for some weeks.
"It could be [an issue], but it could also not be because it’s an area where he had a previous injury as well, and he felt it straight away. It’s not quick."
The Spaniard also spoke about Kieran Tierney’s injury, stating the responsibility is shared between the club and Scottish national team.
"Our responsibility is to look after them when we have them here, but once they go to the national team," he continued.
"In this case, it’s their job and responsibility to decide which team that they believe is the best to win the games, and we have to try to have quick communication with the national teams, which we have, but these things happen.
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