The Blues star has certainly settled in well at Stamford Bridge, with his three goals taking his tally to six in as many games.

There is a fair amount of pressure on the Spaniard to deliver in his debut season for the Premier League champions after joining the club for a record £70m fee.

He also has big boots to fill in Atletico Madrid bound Diego Costa, who played a pivotal role in the Blues" last two title wins.

Morata is hardly resembling a man with weight on his shoulders, though, with a superb hat-trick yesterday making him the league"s joint top scorer alongside Manchester United striker Romelu Lukaku.

But what are the ten best debut seasons the Premier League has seen?

CLICK THROUGH THE GALLERY ABOVE TO SEE THE TOP TEN PREMIER LEAGUE DEBUT SEASONS.