In terms of meeting record, Arsenal has a not very good record when facing Bayern Munich, but even so, that doesn't mean they will be able to lose this match because it is very possible that they can improve their meeting record when facing Bayern Munich. Arsenal will first play as hosts in this match, and this is an opportunity for them to create an advantage before they play the second leg at Bayern Munuch's headquarters.
Arsenal must be able to win this match because it will make their task easier or more comfortable in the second leg. If they fail to win the match in the first leg, then their task will be even more difficult in the second leg, because it is certain that Bayern Munich will have a bigger advantage. Bayern Munich also came with a mission like that, so at least they can hold Arsenal to a draw in the first leg so that they can benefit more in the second leg.
Both coaches will apply their best strategies to get their players through to the semifinals.
Arsenal had bad record when facing Bayern Munich in last several matches before on Champion League, season 2016/17 its the last time participating by Arsenal and defeating many goals by Bayern on first and second leg matches when Mikel Arteta still as players. Currently its not matter with how many matches Bayern Munich leaded head to head, both teams performance in Champion League and domestic league this season drastically difference, Arsenal had better performance lead the top position in domestic league and Bayern Munich loss their performance and this season seems can't be the Bundesliga winner.
Arsenal this time has chance for eliminating Bayern Munich in quarter final round, not matter with how many matches Bayern Munich lead head to head but Arsenal currently has better performance than Bayern.