BARCELONA, SPAIN - MARCH 18: Joe Hart of Manchester City gestures during the UEFA Champions League Round of 16 second leg match between Barcelona and Manchester City at Camp Nou on March 18, 2015 in Barcelona, Spain. (Photo by Michael Regan/Getty Images)

Joe Hart is on the verge of leaving Manchester City after not featuring in City's opening day win over Sunderland.

Willy Caballero started in goals as Pep Guardiola preferred the Argentine to Hart, and Caballero was solid throughout City's 2-1 win.

Hart is City's longest-serving player of the current squad having joined the Manchester club in 2006, but is understood to have accepted his place under Guardiola.

The club are rumoured to be listening to offers in the region of £20 for the 29-year-old, with just under three weeks left of the summer transfer window.

Barcelona goalkeepers Marc-Andre Ter Stegen and Claudio Bravo are some of City's main targets, with Rui Patricio from Sporting Lisbon also on their wishlist.