More than 20 people are being treated in hospital with police looking for the suspect after a homemade explosive is believed to have caused havoc on a commuter train this morning.
"For sure this type of situation is very risky, your mind goes to the people in this situation".
"I felt that was a game with intensity, with two teams going for it, battles all over the pitch, and we responded well".
Mesut Ozil was not in the matchday squad due to a knee injury and Wenger refused to say that his absence, combined with Sanchez's bench role, helped his team's defensive shape.
"To have in your team a powerful player is very important, above all in this league".
"For sure there is great disappointment about this (incident)". A lot of time it's very hard to understand why. Why?
"I think he's happy to join in and just sacrifice, that's what he always does". "The 3,000 tickets issued to Cologne fans were in line with competition rules but it is clear many more visiting fans arrived, causing significant congestion and disturbance outside the stadium before kick-off, " said the club.
Arsene Wenger's side, who sit in the bottom half of the Premier League table after four matches, have won only one of the last 11 league meetings with Chelsea. He paid respects to the quality of his city rivals but he warned his players to keep their discipline after Pedro and Victor Moses's red cards versus Arsenal.
I don't know if they went through Arsenal membership, on the internet... they did very well'.
"After that game we changed a lot of things and then we won the league".
The Blues have won eight of their last ten home games, but they could keep only two clean sheets in that run.
"This week we played midweek games and overall, sometimes it is like that".
"Chelsea have the same objective as us, they want to challenge for the title so it's a big game this weekend".
The bright side for Arsenal is that the club has had success the last few outings against Antonio Conte's side, including last season's FA Cup final triumph and Community Shield win to start this season.