Arsenal need to win today's game if they want to retain there second position in the season, there is no roam for them to lose or draw today's game with Chelsea. Arsenal lost the opportunity of moving to number one position when they lost the game against West Ham United followed by two draws. Now there is only 1 point gap between Nottingham and Arsenal. Nottingham finished 17th on points table last season and now competing to finish second this season, remarkable improvement in the performance.
Meanwhile Chelsea has won it's last two games and is in good momentum to win today's game also. Arsenal need to be careful in today's game otherwise they will surly lose second position.
Arsenal are not highly motivated anymore, they seem to have given up on putting pressure on Liverpool at the top of the standings for the Premier League title this season so I don't think they have much higher motivation to win the match later against Chelsea, in fact Chelsea are now struggling to finish in the top 4 so they need full points more and also we see in the last few matches related to the performance of both teams and it is undeniable that Arsenal are very depressed and that is in contrast to Chelsea.
For betting options, I think it is better to bet on BTTS or over goals in the match later because both teams have the same chance of winning the match and even the odds @ 2.02 for over goals 2.5 are quite worthy to bet on.