A good warm-down is a must if you want to make it through to the final! Spent a good 15 minutes doing some gentle jogging, walking and stretching to help your body cool down and recover.
If you warm down properly you'll not suffer aches and pains the next day, you'll recover more quickly and reduce the risk of injury, which is vitally important. Tennis is a tough sport, so you need to treat your body with respect!