I vividly remember an incident during a Stefan Edberg match many years ago. Edberg was the victim of a bad line call. He walked up to stand underneath the umpire's chair, stuck out his bottom lip and with a sharp outward breath blew his hair up a little bit. Edberg then turned around, walked back to the baseline and played the next point. "That," the commentator deadpanned, "is a Swedish tantrum."
Below is Tactical Tennis's short list of five ways you can improve your mental attitude on the court and become a better competitor....