Theoretically, games with West Ham should not be a problem for Bayer at all, since West Ham are only 7th in the Premier League and they even have a negative goal difference. But it would be great to see Bayer in the optimal lineup + it would be great if Bayer was 100% ready for a potential game with Liverpool. In the Bundesliga, games don't really matter anymore, there are just various statistical points of interest, like how long Bayer's streak of games without defeat can be and whether they can go through the entire season without defeat.
West Ham will be easy for Bayern Leverkusen. Leverkusen has been in terrific form from the beginning of the season, and I believe they will finish the season unbeaten. However, Liverpool will be able to defeat Leverkusen if they meet in the Europa League. If Xavi Alonso finishes this season without defeat, he will be the best coach this season, but I believe Leverkusen will definitely miss a match one day before the season ends, they have already won the Bundesliga trophy because Bayern Munich can't compete with them anymore, with the gap they give Tuchel in the league table, they will just focus on the Champions League against Arsenal, and Leverkusen will focus on West Ham, but he will be a easy match for Leverkusen. Leverkusen will win their next match against Hoffenheim easily because they are playing at home and will not want to lose.
It seems to me that Xabi can already be called the best coach of the season, since winning the Bundesliga in this style is something out of the realm of fantasy, given Bayer’s modest squad. And in general, it is difficult to find any reasons for Bayer’s success other than the work of the head coach. I don’t know if the club will be able to go through the entire season without defeat (in the Bundesliga it probably can), but that doesn’t matter. The most important thing is a title, at least one (and possibly the Europa League).