Meanwhile, Arsenal are confident of naming a successor to Arsene Wenger before the World Cup kicks off next month.
Wenger has repeatedly spoken of his preference for Wilshere to stay at the club, but a breakthrough in the talks has yet to me made.
Defeat to Atletico Madrid in the Europa League semi-finals last Thursday means Arsenal missed out on Champions League qualification for the second consecutive season.
And it seems the initial worries were well founded, with Koscielny forced to undergo surgery earlier today to fix his achilles tendon.
Arsene Wenger has not ruled out becoming general manager of a club when his Arsenal reign ends, but said he now sees another managerial job as his preferred choice.
Fabregas has also won 110 caps for Spain and was part of the squad that won the 2008 and 2012 European Championships either side of the 2010 World Cup.
With Arsene Wenger announcing his departure from Arsenal, the Frenchman has revealed just exactly how many clubs want him at the helm next season. "It is hard for me [to think about managing another English team] I don't envisage that at the moment".
"For sure I will be active - my brain demands work".
Maximiliano Allegri and Luis Enrique are regarded as the popular candidates at The Emirates to take the hotseat, with Wenger set to go away on the finish of the season following an unimaginable 22 years on the membership. I like inexperienced grass and I prefer to stroll on it each morning. I will work. What will I do?
"I expect today will be dominated by sadness", he wrote.
'I think it's a good investment, the player is top quality, been through a hard patch at the moment because hes always in and out.
Wenger, 68, said he hoped he can continue working "as long as I feel I want to" but added: "Overall, people look at your age and make an issue of it".