The victory in south Wales extends Arsenal's club-record run of away wins to 12, and was their eighth straight success in all competitions since their opening-day defeat against Aston Villa.
He said: "We have the desire to be champions, you can see that.
"It's still the early stages of the season, we have only played six games, but I would have signed up to have 15 points now after losing the first game.
"Let's just try and keep going. We have a chance but it is very open.
"You can add Liverpool, Tottenham and Everton to the top four, it will be very interesting.
"What has changed compared to years before is that at 80 per cent you will not beat any team in the Premier League.