By SABC Sport
21st October 2024
Saliba was sent off in the 30th minute against the Cherries, which ended up being costly for the London outfit.
Saliba's red card follows that of Declan Rice and Leandro Trossard against Brighton Hove-Albion and Manchester City respectively.
Partey says whoever will step in for Saliba will have to be on top of their game.
"He's a massive player who we are going to miss and somebody has to step up," the Arsenal midfielder said.
"We have good defenders and the coach knows what he is going to do to help the team and also, any player who is there has to step in and try to give their best. We have to first concentrate on our Champions League game (against Shakhtar Donetsk on Tuesday), try to win, and then move to the next game."
"But at the moment we have to learn from the mistakes, we have to try and stay with 11 men on the pitch," he added.
"We are good when we have 11 on the pitch, we are also good with 10 men, but we cannot stay every game with 10 men so we have to continue working hard and try to stay 11 men on the pitch."
Partey added that Arsenal have a very strong squad which is capable of dominating matches, but things happen in football.
"We have a very good squad and we know every time we stay with 11 men on the pitch we are going to dominate the game and we are always thinking of winning," the Ghana international continued.
"We want to win every game but sometimes as I said, things do happen on the pitch that you cannot control."
Arsenal are third on the league standings after eight games with 17 points - three points behind second-placed City and four points behind first-placed Liverpool FC.