Arsenal boss Arsene Wenger is happy seeing Manchester City proved beatable after Chelsea's win on Monday night.
Wenger accepts if any of the title challengers are not completely focused over the remaining 14 matches, then they can all come unstuck.
"I told you that one month ago, and you did not believe me - there is no invincible team, I think, because there are so many quality teams in the Premier League," said Wenger.
"It is just how close you are to your best every time which decides the game."
