Arsenal striker Alexandre Lacazette is "good" but Chelsea landed a "top drawer" signing in Alvaro Morata, says Paul Merson. "I don't know. But certainly they (Cologne) had more people here than tickets so that was certainly the cause", he said at the post-match news conference.
Although us Arsenal fans aren't expecting much from the match, if it's anything other than three points I think it will be another season of our only realistic ambition is making the top four. And it was the last time Chelsea failed to win a Premier League match in the whole of the rest of 2016.
After losing the opening game of the season against Burnley, the Blues have been quite impressive and head into Sunday's game seeking their fourth straight Premier League win.
Arsenal won the most recent meetings with Chelsea, claiming the FA Cup in May and the Community Shield, on penalties, in August. "I don't know how they managed to infiltrate our fans and get everywhere but they did that very well", he said.
One man who did feature in midweek is Jack Wilshere.
"Anything can happen and for this reason we must pay great attention". They are now on a four-game winning run in all competitions, and they seemed to have given a strong response to their critics - who had claimed that Antonio Conte's side would struggle this season.
The Blues have won eight of their last ten home games, but they could keep only two clean sheets in that run.
Like Costa, England midfielder Danny Drinkwater will not be involved against Arsenal, with his debut delayed until October by a calf injury.
"We worked in full consultation with police and UEFA officials on the night and in advance of the game and had taken extensive steps in advance to prevent tickets being sold to visiting supporters". But I think he's improving a lot and he's very close to be 100 percent fit. "He needs time to recover".
"We are trying to work very hard with him, to adapt himself in our style of football, our idea".