Arsenal Not as good as Dortmund,says Defour

Thegoalmac can reveal that Anderlecht midfielder Steven Defour claims Champions League rivals Arsenal are overly reliant upon the individual brilliance of Alexis Sanchez and Danny Welbeck and are nowhere near as dangerous as Borussia Dortmund.

I don't understand what he means they are overly reliant on Alexis and Welbeck,are they not Arsenal players?Becuase i am sure Dortmund relies so much on Marco Reus and a few others to be as dangerous as he claims.

I get his view that  overall Dortmund is a better or more dangerous team than Arsenal,but saying its because they rely on certain players is what i don't get.What do you think?Continue for what he said.
“Arsenal were hoping for a moment of brilliance from Alexis Sanchez or Danny Welbeck and didn’t have many runners from midfield. Dortmund’s midfielders seemed to be coming from everywhere three weeks ago,” Defour told reporters.

“Three weeks ago, Dortmund outplayed us and we have to accept they were the better team, but I don’t think Arsenal were stronger than we were.”

However, the former Porto man feels Anderlecht’s tactics also played a role in Arsenal’s struggles at the Constant Vandenstock Stadium.

“But I think we were better organised this time around than against Dortmund as well. We deliberately sat deep because we knew we were facing a good team.

"They can play some great football, so we needed that bit of extra certainty. We wanted to hit them on the counterattack and I think we did well.”