Arsenal manager Arteta hails Pep Guardiola's work at Man City and believes the Cityzens can achieve more at the Etihad.
Pep Guardiola's Manchester City side have to win the Champions League to be considered as the best team Premier League has ever seen, says Arsenal manager Mikel Arteta.
The Cityzens are in full form as their 4-1 win over Wolves meant they have now registered 21st successive wins across all competitions.
City now top the English top flight by 15 points over second-placed Manchester United, whom they host at the Etihad this weekend.
As the latter stages of the season approaches, Guardiola's men are being compared to other great Premier League sides like Alex Ferguson's treble-winning United team of 1998-99 and Arsene Wenger's Arsenal 'Invincibles', who went the entire 2003-04 season unbeaten.
And Arteta, a former assistant to Guardiola at City, thinks the runaway leaders still have a lot of work to do to reach those heights.
"With the maturity that they've shown and the way the team has evolved in recent years, I would say that at this moment it's the best," Arteta told reporters on Wednesday.
"To say they're the best ever means they have to win everything like that team did a few years ago when they won the four domestic competitions [City's 2018-19 domestic treble, plus that season's Community Shield].
"If you add to that the Champions League, then there is no question because nobody's done it."
When asked whether City can eclipse Arsenal's 'Invincibles', Arteta said: "I don't think we need to compare. I think what City's doing under Pep is phenomenal, not just this season but every season they've been together.
"To sustain that level of perfection, to sustain that hunger and the way they play football is a joy to watch. We have to be grateful that in this country we have the joy of experiencing something like that.
"It's not about the way they play, it's the character that the team shows, the spirit it shows, the hunger - and not just with the ball.
"The best example is that these players, with the ability they have, chase the ball down when they lose it. That's remarkable and Pep has done that at every club."