Torres took 52 games to score 7 for Chelsea - Costa did it in 4

Diego Costa has made Fernando Torres look silly with his excellent start to Chelsea life.

Chelsea are now the only team left in the Premier League with a 100 per cent record after they defeated Swansea City at Stamford Bridge.

They struggled for large periods of the first-half and were 1-0 down courtesy of a John Terry own goal. However, they soon found their way back into the game, and it was that man again.

Yes Diego Costa was once again sensational.

The Spanish international had to leave international duty because of his troublesome hamstrings recently, so there were question marks over whether he would start this game.

But he did, and went on to score the first Premier League hat-trick of the season.

That took his record at Chelsea to an astonishing and unprecedented seven goals in his first four appearances - a truly sensational record.

Costa cost £32 million from Atletico Madrid this summer and has taken over the role of number one striker from the disappointing Fernando Torres - who went to AC Milan on loan for two seasons.

To put into perspective just how different the two started their respective Chelsea careers, you only have to look at how long it took Torres to get to seven goals for the club.

On the 18th March 2012 Torres scored a brace against Leicester City in the FA Cup to take his tally for the club from five to seven. Sensationally, that was his 52nd game for the club.

Costa, who cost £18 million less than Torres, has reached his tally in 48 games less.

Now that is certainly an upgrade.

Register for CHELSEA team updates

Register for HITC Sport - Daily Dispatch