Arsenal defender Per Mertesacker has hailed the quality of their attack.

Arsenal have been the Premier League's form team in 2015, winning 18 out of 22 games in all competitions since the turn of the year.

Mertesacker said, "We are so unpredictable in what we are doing, even for me at the back sometimes it looks a bit weird!" he said. "Sometimes we lose balance but sometimes it is really good so we have to keep going and focus on our game, especially defensively.

"We want to qualify directly for the Champions League. The championship has gone but it would be an improvement for us from last season where we had those two qualifying matches [against Besiktas], really tight ones, to secure the Champions League."