Chelsea forward Christopher Nkunku is not getting complacent despite his side’s promising start to the season. Chelsea are just three points behind first in the Premier League table and have just beaten Barrow 5-0 in the Carabao Cup. Christopher Nkunku was key in the Blues’ third-round win, scoring a hat-trick. It took his tally for the season to six goals, with the 26-year-old being absolutely clinical in the cup competitions. Enzo Maresca was impressed with Nkunku’s latest display and the Frenchman would have also been happy with his and the team’s overall performance. However, he has still …