Yes, you can. However, do let your massage therapist know so that he or she can avoid going full on with the massage. Too intensive a massage will result in your muscles being too relaxed. This effect muscle recruitment later during your event. You will experience a lack of power and slower firing of the muscles. A full deep sports massage is fine 48 hours before your event.
For pre-event massage, like an hour before the event is usually light and aims to limber up the muscles. Not relax it as in the usual sports massage sessions.