The 2004 Hamburg Masters was a tennis tournament played on outdoor clay courts. It was the 97th edition of the Hamburg Masters, and was part of the ATP Masters Series of the 2004 ATP Tour. It took place at the Rothenbaum Tennis Center in Hamburg, Germany, from May 10 through May 17, 2004.
Roger Federer def. Guillermo Coria 4–6, 6–4, 6–2, 6–3
- It was Roger Federer's 4th title of the year, and his 15th overall. It was his 2nd Masters title of the year, and his 3rd overall. It was his second title at the event after winning in 2002.
Wayne Black / Kevin Ullyett def. Bob Bryan / Mike Bryan 6–4, 6–2