West Ham staged somewhat of an upset, as they got the better of City 2-1 at the Etihad Stadium in the Premier League.
Chelsea-owned winger Victor Moses put the Hammers ahead after just six minutes, and Diafra Sakho doubled the advantage just past the half-hour mark.
Kevin De Bruyne fired home for City on the stroke of half time, but West Ham kept out City in the second 45 minutes.
Former Newcastle United and City midfielder Barton was following the match, and he was impressed with the performance of the West Ham players, especially that of Dimitri Payet.
Another great result for West Ham. 9 points from visits to the Etihad, Emirates and Anfield. Payet was tremendous again.— Joseph Barton (@Joey7Barton) September 19, 2015
Cracking 1st half performance from @whufc_official Solid defensive shape and real threat on the break— Dean Ashton (@Dean36ashton10) September 19, 2015
The more you see West Hams GK Adrian the better he looks.— Craig Burley (@CBurleyESPN) September 19, 2015
The win at the Etihad has lifted West Ham up to second in the Premier League table with 12 points from six matches, just three points behind leaders City.
The victory means that Slaven Bilic’s side have won all three of their away games in the league, having already defeated Arsenal and Liverpool at the Emirates Stadium and Anfield respectively earlier this season.