1991 Mercedes Cup – Singles
Goran Ivanišević was the defending champion, but lost in the second round to Andrés Gómez. Michael Stich won the title by defeating Alberto Mancini 1–6, 7–6(11–9), 6–4, 6–2 in the final. Seeds
All seeds received a bye to the second round. Draw

Finals

Top half

Section 1

Section 2

Bottom half

Section 3

Section 4

References

External links
 Official results archive (ATP)
 Official results archive (ITF)

Stuttgart Singles
Singles 1991