^"Lendl beats Davis in final, 3–6, 6–3, 6–4". The New York Times. Associated Press. 31 October 1983. Retrieved 1 January 2024. COLOGNE, West Germany, Oct. 30 (AP) - Matt Doyle, the Irish Davis Cup player who lives in California, beat Hans-Dieter Beutel of West Germany, 1-6, 6-1, 6-1, today and took an $88,500 Grand Prix tournament.
^"Cologne 1983". Ultimate Tennis Statistics. Retrieved 1 January 2024.