The 1991 German Open was a men's tennis tournament played on outdoor clay courts. It was the 85th edition of the Hamburg Masters (Hamburg Masters), and was part of the ATP Super 9 of the 1991 ATP Tour. It took place at the Rothenbaum Tennis Center in Hamburg, Germany, from 6 May until 13 May 1991. Karel Nováček, who was seeded 13th, won the singles title. Finals Singles Karel Nováček defeated Magnus Gustafsson, 6–3, 6–3, 5–7, 0–6, 6–1 It was Karel Nováček's 2nd title of the year, and his 5th overall. It was his 1st Masters title of the year, and overall. Doubles Sergio Casal / Emilio Sánchez defeated Cássio Motta / Danie Visser, 4–6, 6–3, 6–2 References External links ATP tournament profile ITF tournament edition details German Open Hamburg European Open ATP German Open