Thomas Tuchel's Chelsea picked up all three points in their first away game of the season thanks to a 2-0 win away to Arsenal.

In the first half, Reece James linked up with Romelu Lukaku for the Belgian to net on his second Chelsea debut. With ten minutes to go before halftime, Chelsea doubled their lead. Reece James thumped one in to give Chelsea a bit of breathing space.

In the final 45, Arsenal decided to push forward but were unable to find the net against a strong Chelsea team.

Here are five things we learned from Chelsea's win:

1) Romelu Lukaku's presence instrumental for the Blues

Since his arrival from Inter Milan, Chelsea fans had to wait a bit to see Romelu Lukaku make his Chelsea debut. However, the Belgian forward started for the first time against Mikel Arteta's Arsenal. Right from the get-go, Lukaku made himself known. Romelu was up against both Rob Holding and Pablo Mari. It is fair to say that the defenders had no answer for Lukaku's physique. In the first half, Romelu simply bullied the Arsenal backline and was rewarded with a debut goal. Even in the second half, Lukaku's link-up and hold up play was exceptional in what was a fantastic debut from the new signing.