Sunderland defender Ondrej Celustka believes that there are plenty of positives to take from his side's defeat to Arsenal.
The Black Cats lost 3-1 to Arsene Wenger's team as Aaron Ramsey scored a second-half brace in a controversial game at the Stadium of Light.
Celustka told the club's official website: "For us it was tough because Arsenal are a big team; one of the best in the world.
"We can be disappointed with the result because although we didn't play well in the first half, the second half was much better.
"We had some very good parts in the game and for us we have to take advantage - in the next match against West Brom as well."
Sunderland are currently bottom of the Premier League after four games this season.