And Keown believes Costa and Hazard's attacking threat was a step too far for City's defence to cope with.
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Chelsea duo Eden Hazard and Diego Costa impressed Martin Keown on Saturday
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Antonio Conte's Chelsea sit top of the table after beating Manchester City
hen I saw Eden Hazard run through on Aleksandar Kolarov it was almost embarrassing. It looked like Kolarov was running through treacle
Martin Keown
"City struggled with the pace and power of Diego Costa," Keown said in his Daily Mail column.
"When he chested that diagonal pass from Cesc Fabregas, Nicolas Otamendi was shrugged off.
"There aren’t many who can handle Costa in a one-v-one but Otamendi should have done better. You don’t want your centre backs being swatted away.
"When I saw Eden Hazard run through on Aleksandar Kolarov it was almost embarrassing. It looked like Kolarov was running through treacle!
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Eden Hazard celebrates scoring Chelsea's third goal
"Kolarov will have been picked for his attacking qualities. Pep Guardiola will have set out to win the game before Hazard got a sniff of goal.
"But when you play with such freedom, you leave holes for teams to run into."
A win for Chelsea extended their unbeaten run in the league to eight consecutive wins, leaving them three points ahead of second-placed Arsenal.