1999 ATP German Open

The 1999 German Open was a men's tennis tournament played on outdoor clay courts. It was the 93rd edition of the Hamburg Masters (German Open), and was part of the ATP Super 9 of the 1999 ATP Tour. It took place at the Rothenbaum Tennis Center in Hamburg, Germany, from through 3 May through 10 May 1999.

Singles
🇨🇱 Marcelo Ríos defeated 🇦🇷 Mariano Zabaleta 6–7(5–7), 7–5, 5–7, 7–6(7–5), 6–2
 * It was Marcelo Ríos' 1st title of the year, and his 13th overall. It was his 1st Masters title of the year, and his 5th overall.

Doubles
🇦🇺 Wayne Arthurs / 🇦🇺 Andrew Kratzmann defeated Paul Haarhuis / 🇺🇸 Jared Palmer 4–6, 7–6(7–5), 6–4