He told reporters: "It is great that Pep has re-signed. It is fantastic for the Premier League. He keeps setting the standard which is great for all of us trying to mow him down.
"I think in many varied and different ways. One is through a sustained excellence. It is not easy to win in different countries and I know that he has been at big clubs but again, as we have seen recently, that is not necessarily transferable to winning things all the time. You still have to do it.
"So he has maintained a ridiculous level of excellence. The way his team plays, they are always challenging every opponent they face and just his energy to maintain that for so long is outstanding. He will go down as one of the greats already but the indication that he has resigned probably means that there is more to come."