The future of Lionel Messi at Barcelona is again in doubt as he continues to have issues with Luis Enrique.

Former Barcelona attacker Hristo Stoichkov suggested Messi could leave the Camp Nou "through the back door."

"They have not known how to look after Messi," Stoichkov said. "Tell me any foreign player who has not ended up leaving Barca through the back door."

Just last November Messi hinted that he would decide on his future at the end of the current campaign, with Chelsea and Manchester City named as potential destinations in the Madrid media.

Messi began following Chelsea on Instagram on Monday.

The Messi speculation is unfolding amid a situation of institutional chaos at the Camp Nou, with sporting director Andoni Zubizarreta having been fired after criticising club president Josep Maria Bartomeu, and his assistant and recently retired defender Carles Puyol then apparently resigning in sympathy.