The purpose of this study was to determine heart rate (HR, b·min−1) response during competitive match play of 6 men who were skilled wheelchair (WC) tennis players. Each participant completed an arm crank ergometer test that measured HR via a telemetry device and JOURNAL/jscr/04.02/00124278-200608000-00031/ENTITY_OV0312/v/2017-07-20T235325Z/r/image-pngO2 via open circuit spirometry from rest until fatigue (JOURNAL/jscr/04.02/00124278-200608000-00031/ENTITY_OV0312/v/2017-07-20T235325Z/r/image-pngO2peak). Each athlete participated in 2 competitive singles matches during which HRs were recorded in 5-second intervals and JOURNAL/jscr/04.02/00124278-200608000-00031/ENTITY_OV0312/v/2017-07-20T235325Z/r/image-pngO2 was estimated using the corresponding HR values recorded during the arm ergometer tests. Data analysis revealed an average playing intensity of 69.4 ± 8.9% of HRpeak and 49.9 ± 14.5% of JOURNAL/jscr/04.02/00124278-200608000-00031/ENTITY_OV0312/v/2017-07-20T235325Z/r/image-pngO2peak. In conclusion, it is recommended that skilled adult WC tennis players perform off-court aerobic conditioning as part of their training program, because the intensity of a competitive WC tennis match is sufficiently high enough to stress the cardiovascular system.