Liverpool no longer need to win in the Premier League because Liverpool have won the Premier League trophy this season. And even if Arsenal loses this week's match at Liverpool's home, it will not affect Arsenal because the Arsenal team will also qualify for the Champions League next season.
Liverpool have nothing to fight for again, they have been given the premier league trophy already, and they are out of other competitions left, so they are going to play freely against Arsenal, either they win or lose, it’s not really going to add anything to them. Arsenal still need to get a win in the match, if Arsenal cant win the remaining matches which they are having left, then they might not even end the season in top 2 which they are currently in, because Manchester city is currently behind Arsenal, and any mistake from Arsenal then Manchester city will be taking over their current position.
I still consider the game between Liverpool vs Arsenal a tough one because Liverpool is not a team that like or are comfortable with losing and after their 3 goals to 1 defeat to Chelsea they would want to bounce back to winning ways.