Arsenal striker Danny Welbeck says Alexis Sanchez could leave the North Londoners as he raised concerns about losing key players in the summer.
The Chile international confessed to Sky Italy that he was bitterly disappointing for not fighting for the Premier League with recent reports claiming that he wants to leave to enjoy Champions League football elsewhere.
Manchester City and Bayern Munich are both interested.
"It's obvious to see how important he is for the team with his great ability on the pitch and also off it with his attitude," Welbeck told the Evening Standard.
"It's not great to lose your best players.
"[My fitness level?] It has been difficult, coming back from injury and getting into the team and out of it.
"I have just got to make sure I'm integrated well into the team, not just in for a certain amount of games but repetitively one after the other.
"My body has got to adjust to the training load and then playing in the matches so you do get your niggles here and there, it's something you have got to cope with. But I feel like I've been handling it pretty well and have had no major reactions with my knee."
