Marsch arrived from Salzburg as the successor to Julian Nagelsmann, who left for Bayern Munich, but has overseen a series of disappointing results, with the loss to Union and Saturday's results leaving them 11th in the table.
Leipzig has already been eliminated from the Champions League and could yet miss out on a spot in the Europa League too as they sit level with Club Brugge on four points in Group A.
Marsch has struggled to combine a high-intensity press with a solid defence, with the departure of France international centre-back Dayot Upamecano clearly still hurting the team.
Only Cologne (8.6) have a better PPDA than Leipzig (8.6) in the Bundesliga this season – a measure of the number of opposition passes allowed before a defensive action – while the Red Bulls lead the league in high turnovers (159) and shot-ending high turnovers (26), though they have been unable to score from any of them.
However, the defence has been Leipzig's downfall. They have already committed six errors leading to shots in the Bundesliga (an increase of one from the entirety of last season) and three of those have ended in goals. None of their mistakes directly resulted in goals conceded under Nagelsmann in 2020-21.
Leipzig has conceded 18 goals in the top flight but have an expected goals (xG) against of 23.6. Their xG against in the 2020-21 top-flight campaign was 29.6.
Leipzig entertains Manchester City in the Champions League on Wednesday (AEDT) and faces Borussia Monchengladbach, Augsburg and Arminia Bielefeld in the Bundesliga before the mid-season break.