Arsenal boss Arsene Wenger accepts that is will be difficult to replace forward Alexis Sanchez if he exits the Emirates Stadium this month.
The Chile international is out of contract in the summer and is reported to be a target for Manchester City, with Manchester United also rumoured to have entered the bidding for the former Barcelona forward.
Nothing is really concrete at the moment and nothing is decided one way or another.Arsene Wenger
And Wenger admits that the balance of his side will change if Sanchez does opt to move on, telling reporters: "Is Alexis replaceable in the way that we find exactly the same players? Certainly not. But there's always a way to find a different balance.
"Alexis is an exceptional football player, he's a world-class player and, if that happens (he leaves), we have to find a different balance in the team."
Of the current situation surrounding Sanchez, who has scored 60 goals in 122 Premier League appearances for the Gunners since his arrival in the summer of 2014, Wenger added: "Normally he would stay until the end of the season, but we'll see.
"Nothing is really concrete at the moment and nothing is decided one way or another. Of course I want a quick resolution."
Meanwhile, Wenger also praised Sanchez for his continuing commitment, which the Frenchman says has not wavered despite recent speculation about his future.
He concluded: "When he's on the football pitch he wants to win, he's committed. I've never questioned his professional attitude when he's on the football pitch."
The Gunners are in action at Bournemouth on Sunday, with the visitors having claimed a win and a draw on their two previous Premier League visits to Dean Court.
Arsenal are priced at 21/20 to win on Sunday and are 17/2 to secure a 2-1 victory, with Danny Welbeck available at 5/4 to score at any time.
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