West Ham United manager Slaven Bilic has pointed out a weakness of Arsenal's ahead of Wednesday night's clash at the Emirates.
The Hammers make the short trip to North London on the back of four consecutive defeats in the Premier League.
Just nine wins out of 30 has left Bilic's side 14th in the table, while Arsenal are in danger of missing out on the top four this season as they sit seven points adrift.
The Gunners have not won a league game since February, and they dropped points again on Sunday when they drew 2-2 with Manchester City on home soil.
"It's my second season, whereas Arsene [Wenger] has been there more than 20 years, so it's different but our recent results are similar," Bilic told reporters in Tuesday's press conference.
"I watched Arsenal's game with Man City on Sunday twice and they were very motivated and up for it physically and tactically. I saw a few things. They have their problems otherwise there wouldn't be issues now. When they lose the ball, they are vulnerable."
The Gunners thumped West Ham 5-1 in their meeting at the London Stadium in December.
