Pep Guardiola's Manchester City have been told by Ryan Giggs they need to win multiple titles before they can be considered the greatest Premier League side ever.
City now need just six more top-flight victories from their final 11 fixtures to guarantee they will be crowned champions having blitzed their rivals by dropping only nine points so far.
That form, coupled with the aesthetically-pleasing style Guardiola's side have produced, has led to suggestions his team could be thought of as the best in Premier League history.
Yet former Manchester United winger Giggs, the division's most decorated player, insists City have to back up their "wonder season" with further titles if they want recognition alongside United's 1999 treble-winning squad, Arsenal's Invincibles and Jose Mourinho's first Chelsea side.
Speaking in Monaco in his role as an ambassador for Laureus, Giggs said: "At the moment they're up there because of the performances and the results that they've shown this year.
"I think to compare them to ourselves, Arsenal, Chelsea, you have to win multiple titles, you have to be consistent, not just one wonder season, which they are having.
"But the way that they play this year, they're capable of doing that.
"It's up to the other clubs, the likes of United, Liverpool, Chelsea, Tottenham to do better next year and to challenge and see how they handle that."