In an average tournament, you might have around 20 games that are 9-9 or 10-10.  Your success or failure during the tournament largely rests on winning those games.  I have a few tips that will help you better win those important sets.
 
#1 Enjoy them!  You probably enjoy the rush from other things in life like roller coasters, scary movies, caffine, and other things.  If you feel a bit excited in a close game and your heart is pounding a bit harder, learn to enjoy it!  Enjoying those close games with a smile will help you to relax and play your best!