Arsenal loses to Man City in the FA Cup thanks to a Nathan Ake goal.

Nathan Ake's goal in the second half gave Manchester City a 1-0 victory over Premier League title rivals Arsenal on Friday in a crucial FA Cup fourth round match at the Etihad Stadium.

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In a game with few clear-cut opportunities, Ake's second goal of the season, which came in the 64th minute after Julian Alvarez, the replacement, had hit the post with a shot, broke the scoreless tie

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Arsenal are left to concentrate on their quest for a first Premier League championship in 19 years as City advances to the round of 16 for the eighth consecutive season.

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The two clubs will square off again in the league on February 15. Mikel Arteta's squad now leads City by five points and has a game in hand.

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Arsenal has been defeated by City in their past six encounters in all competitions.

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"Tight game, better second half," Guardiola said to ITV Sport. "very challenging foe.

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"In the locker room, not a single person is not overjoyed for him (Ake). We are pleased with the goal and the way he managed one of the Premier League's most dangerous players.

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World Cup champion Alvarez fired a 25-yard shot just minutes after walking onto the field, but it deflected off the foot of the goal post

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When the ball rebounded, Jack Grealish did a good job of picking it up and eluding players before passing it to Ake, who finished skillfully past Turner and into the far corner with his weaker right foot.

In the latter minutes, the visitors came back hard and pressed for an equaliser that would have necessitated a replay, but City's defence, and Ortega in goal in particular, were up to the task.