To be honest , Erik Ten Hag will be facing alot of more pressure now as he got in the last years and even in Manchester United for sure.
That's for sure, that's the way things are, but this is where ETH has to prove that he was the best choice for Leverkusen, for me the fans are already used to good results, he has to live up to it, otherwise it will be a very bad thing for him if he can't live up to the expectations, he is really strong , I wouldn't want to be in his shoes.
The opening match, against Flamengo's U-20 team in a friendly, with a surprising result, will certainly increase the pressure on Ten Hag for next season. Ten Hag must immediately change and evaluate his current strategy. If his performance doesn't improve, this will only increase the pressure on him, which could ultimately lead to a similar situation to when he coached Manchester United.
Ten Hag shouldn't be under as much pressure as he was when he coached Leverkusen, as it was different from when he coached Manchester United, which was full of pressure from all sides. However, Ten Hag's mistake in his first match will certainly be a bad start, and put him under pressure at Leverkusen now.
If Ten Hag wants to prove that Leverkusen made the right decision in hiring him, he must immediately evaluate the team so that he can improve. If he continues to experience negative results, I think his position as Leverkusen coach will worsen.
I also think Bayern Munich will easily defend their Bundesliga title this season, as so far I haven't seen any serious challengers. Leverkusen will certainly face difficult times under Ten Hag, and I don't think Dortmund will be strong enough to match Bayern Munich's strength next season.