One lost in the opening round to newcomer Brentford, suffers from shortages and seems unable to shake off the crisis.
The second is the European champions, who opened the season with a light 0: 3 over Crystal Palace, and tonight (Sunday, 18:30) will premiere again its most expensive acquisition of the season.
And yet, despite these one-sided opening figures, the London derby between Arsenal and Chelsea is a game that you never know how it will end.
Beyond the fact that this will be their first game with a crowd at the Emirates Stadium in 17 months, the last three meetings between the teams all ended with a victory for the Gunners.
Once in the cup final and twice in the league.
After completing the acquisition of Martin Edgor and Aaron Ramsdale, Mikel Arte will try to continue this streak with Pierre-Emerick Obmiang and Bukayo Saka expected to return to the squad, and of course with crowd support.
"I am excited and excited to continue working and making this project a success," the Spaniard said.
Lukaku in 2013.
Tonight re-premiere in Chelsea uniform, AFP
On the other hand, Thomas Tuchel has already managed to make his project a success, and tonight he will add Romulo Lukaku, who is expected to make a new debut at Chelsea.
The Belgian striker may have scored just three goals against Arsenal throughout his career, but he comes after a wonderful season at Inter and in the best shape of his life.
In addition, after the Gunners' defense struggled against Brentford, it will be interesting to see how they deal with Lukaku.
More today:
Jaydon Sancho is likely to make his Manchester United debut, playing against Southampton; Harry Kane is expected to take part in the game between Tottenham and Wolves (16:00).