Lukaku was unavailable for Chelsea's 3-0 win against Palace over the weekend but is expected to feature against Arsenal Sunday
Belgium international Romelu Lukaku said he has evolved since he last played in the Premier League two years ago and has returned to Chelsea as a more complete player.
The 28-year old striker moved to Chelsea from Inter Milan last week for a reported sum of 97.5m pounds ($135m), earning him a second spell at the London club where he spent three seasons from 2011 to 2014.
Lukaku was Inter Milan's top scorer - with 24 goals - in Serie A last season, leading them to their first Scudetto in 11 years.
After leaving Chelsea, Lukaku switched to Everton before signing for Manchester United in a big-money move in 2017 that ended in disappointment.
Criticized for his levels of fitness and lack of finesse, the striker left Old Trafford after just two seasons.
Lukaku, however, insisted that he has no "unfinished business" in England.
Lukaku added that he likes manager Thomas Tuchel's system and is prepared to adapt.
Lukaku was unavailable for Chelsea's 3-0 win against Crystal Palace over the weekend but is expected to feature against Arsenal Sunday.