joe hart conceded four goals in man city 's 4-2 defeat at old trafford .
the man city stopper appears to have given up on trying to catch arsenal .
hart said after sunday 's defeat that ` it 's essential to try and finish third '
read : gloves on april 12 ?! man city players feel the derby day cold .
read : ashley young laughs at city as united silence ` noisy neighbours '