Ahead of the first game, Wenger was asked if this would be his most hard season and responded in agreement, praising the work his side's main rivals have done with their transfers.
They're also playing a team that they haven't lost to in the League since 1994, and even during Leicester's incredible title-winning season of 2015-2016 Arsenal triumphed in both fixtures, including a 5-2 thrashing at the King Power Stadium.
In contrast, Arsenal fans in North London typically earn the most of all Premier League fans at £663 per week. Bet 365 are giving odds of 8/15 for Arsenal to see past Leicester.
Mourinho added: "The challenge is to win more matches than we did, by scoring more or conceding less, I don't know".
Arsenal certainly appear to be doing all they can to hold onto their star man, at least for another season, but that will not stop the speculation that's for sure. We got a central midfielder, a striker, obviously the 25 per cent would be for a player from the sides, but we have players. Laurent Koscielny is banned, while Per Mertesacker, Mesut Ozil, Jack Wilshere and Aaron Ramsey are fitness doubts.
"The goals we conceded, we can work to get rid of that".
Of course, this leaves a lot of interested clubs with a big problem, unwilling to spend more than £10m on a player who only made four league appearances last season.
"Alexis will not be available for example, so I can not go into the game with too many uncertainties", Wenger said.
Arsenal will probably be without some of their key players due to injury.
"Kolasinac is a good player, he has an attitude that is suited to the premier league, that means hes determined, aggressive, forceful and he wants to play".
But Leicester manager Craig Shakespeare also struck a bullish note in his pre-match press conference despite the fact he'll be without the injured Vicente Iborra, Danny Drinkwater and Robert Huth.