Ivanovic says Chelsea's trip to Arsenal their biggest challenge so far
The Premier League leaders have recorded four wins and a draw from five matches to sit a point clear of Manchester United but the Serbian is well aware that the in-form Gunners, who sit fifth without a loss, will be very difficult to beat.
"We have the next game as a very great challenge for us in the Premier League - Arsenal away," he said. "This is the first actual big game for us this season.
"Our performances and quality - we know how it is. But we have to show everyone, and we have to show it every game.
"This is the biggest challenge. I think Arsenal will be a great challenge for us, and we have to really be ready for that."