#1 Confident mentality and great form

Arsenal has won 4 of their last 5 games in the Premier League; one draw coming against Tottenham at Wembley. Tottenham, on the other hand, has lost 4 of their 5 Premier Leauge games; one draw coming against Arsenal. You can see why Arsenal are the favourites to finish the season bagging the third place.
This final term of the season demands incredible mental and physical strength. Right now, Arsenal is in red hot form, scoring 12 goals and conceding just 2 in their last five league games. None of the other teams in the league has been able to match this form, except City, who have scored just 1 goal more than Arsenal in their last five league games.
Unai Emery has brought in a different mentality to his squad. Emery's style of play demands an immense work rate, confidence, and precision. His ability to approach every game in a different style has taken Arsenal to a better level, and UCL football is all the fans ask for, which for now, looks in the bag.