City are the only side in the Premier League who boast a 100 percent record this season, but Guardiola is not thinking about getting his hands on the Premier League title in May.
Instead, the former Barcelona and Bayern boss just wants to qualify for the Champions League.
"I honestly just think qualifying for the Champions League will be very tough," he said.
"United played really well [against Leicester City], Liverpool are especially playing very well, as are Tottenham, Chelsea and Arsenal. Everton may have lost, but they are all so, so strong".
Guardiola insisted that he is just taking things one game at a time.
"Now we are thinking of Celtic and then it will be Tottenham and that's how we'll go forward. At the end of the season, we'll see how our levels were and whether we were better than our rivals or not".