Bayer Leverkusen are seven points afloat, the team has lost two out of five last Bundesliga games, and Thomas Tuchel’s tenure at Allianz Arena is not slowly reaching its inevitable end.On a daily basis, we read about issues Tuchel is facing in the locker room with numerous players, including the most experienced ones. Therefore, tonight’s Bundesliga clash with Union Berlin will be a do-or-die for Tuchel, who’s facing an avalanche of criticism in the German media, already eager to find him a replacement.More and more unhappy veterans in Tuchel’s locker roomHowever, the man’s still hanging and will make one change in the squad following a dreadful 1-0 defeat to Werder Bremen on Sunday. Joshua Kimmich and Raphael Guerreiro have been the preferred midfield pivots, but Leon Goretzka could make his return to the starting eleven in place of the latter. Although Matthijs de Ligt suffered a capsule injury in his left knee during the club’s training camp in Portugal, the Dutchman started against Bremen on Sunday and is again expected to partner Dayot Upamecano, with Kim Min-jae currently representing South Korea at the Asia Cup.##NAJAVA_MECA_7821806##Mathys Tel also performed well when substituted against Bremen but will likely find his place on the bench. Serge Gnabry remains sidelined with a hamstring injury.