If we fall short this year I don't think it will be because of 'choking'. I may be wrong but IMO the more likely cause will be burn out and/or injury problems.
Players like Ozil, Sanchez and Cech will win you the title but they can't do it on their own and a long term injury to one will see us struggling - although it was positive to see us get the City result without Sanchez.
A good signing or two in January could push us on but I'm waiting more in hope than expectation for that.