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Featured Image Credit: Image: PA
The Belgian striker opened his account for the Blues just 15 minutes into the game at the Emirates and it was a perfect summary of what he brings to the European champions following his £97.5 million move.
He pinned himself against Pablo Mari and linked the play superbly, before bullying the defender and getting on the end of Reece James' cross to the far post.
It was his first goal for Chelsea, having failed to find net in 15 appearances during his first spell at Stamford Bridge.
That was ten years ago though and these days Lukaku, following a stellar stint in Italy with Inter Milan, is a complete striker.
With his physical presence, he gives a completely new dimension to the Chelsea attack and dominated Arsenal in the same way that his idol Didier Drogba did on so many occasions over the years.
The Gunners simply could not cope with him all afternoon in the 2-0 defeat and Lukaku would have had a second goal had Bernd Leno not made an incredible instinctive stop to push his header onto the crossbar.
Leaner and sharper, with a better first-touch and a more well-rounded game that he has honed with the help of Antonio Conte, the 28-year-old looks ready to rip up the Premier League.
Unsurprisingly, Gary Neville named Lukaku as his Man of the Match while on commentary for Sky Sports.
“A complete centre-forward performance, from start to finish," Neville commented on Lukaku's display.
“Not just his goal, but his all-round play has been the difference between the two teams.”
After the game, Lukaku was asked to assess his performance during a post-match chat with Geoff Shreeves.
"Dominant, I would say," the former Manchester United and Everton man replied.
"I try to improve every time, I have a long way to go, but today was good to win and to start well.
"You want to work hard for the team, you want to win, you want to score your chances.
"It's something I've learnt and worked really hard on, and I keep working at it because this team is very talented.
"They're the European champions but they want to keep building, I want to keep winning. We have to keep fighting, working hard and keep delivering performances like this."