Of Irish ancestry, Doyle played in 17
Davis Cup ties for the
Ireland Davis Cup team over 8 years. In the Irish's sole appearance in the World Group, in 1983, Doyle kept Irish hopes alive versus
Italy in the first round by winning the fourth rubber over
Claudio Panatta, in an away tie (played on clay). Unfortunately, however,
Corrado Barazzutti was in top form and easily dispatched
Sean Sorensen in the deciding fifth match, 6–0, 6–3, 6–3. (Doyle had also lost to Barazzutti in straight sets in the opening rubber.) This loss, however, set up a memorable tie versus the
United States, with the winner to remain in the World Group for the following year. Played at
RDS Arena to accommodate the 6000 spectators who attended, the match-up featured World No. 1
John McEnroe playing competitively for his only time in Ireland. As expected, McEnroe dominated, winning his two singles matches — as well as the doubles rubber with his partner
Peter Fleming — in straight sets. Doyle stayed close in the first set versus McEnroe, succumbing in the end 7–9, before going down in the second and third sets 3–6, 3–6. Doyle did get the only consolation win, leveling the tie at one apiece by defeating
Eliot Teltscher in the second rubber, 6–3, 6–4, 6–4. Doyle had a career singles Davis Cup match win–loss record of 19 and 10, and a doubles record of 8 and 7. ==Grand Prix career finals==