After beating Swansea City 4-2 at Stamford Bridge, this was surprisingly one of them.
Chelsea are clear at the top of the Premier League, sitting five points above Manchester City and six clear of Arsenal, but Mourinho didn't want to get too carried away.

Once again, Chelsea fans were treated to a masterclass from the Spanish international, who increased his goal tally to seven in just four games this season following his match-winning hat-trick against the Swans. From being a goal down and largely outplayed in the first half, Costa rescued Chelsea with his header on the stroke of half time, before going on to all but win the game after the interval.
Struggling in front of goal last season, Chelsea are suddenly the Premier League's biggest threat, with 10 goals in their last two outings alone.

They've conceded five goals in the process, but with Costa leading the line, Chelsea have the power to outscore teams these days. Mourinho will rue the goals against column that sits at six already this term—at the same stage last year it was two—but Abramovich will relish the 15 that have gone in at the other end.

Boring, boring Chelsea have suddenly become scoring, scoring Chelsea. The season remains in its infancy, but it's clear the need to park buses and win games by the odd goal has long departed Mourinho's thinking. Chelsea are entertaining now like they never have since Abramovich brought the club in 2003. And Costa's the catalyst for it all.

There have been moments of brilliance in the past decade or so, periods when they've threatened to win the popularity vote as well as titles with a silky brand of football, although now it feels a little different. It seems real. The season has started with an explosion and shows no signs of abating.