In terms of sports, it’s really important for one to practice well and accordingly especially if that person has plans in inviting his or her family and colleagues to attend the sports he or she is having. However, that’s not really important though. As long as a person has the will to win it, then practicing as much as he can do is already enough.
Meanwhile, in terms of inviting our loved ones for this particular event… sending them through mail (just make sure you got mailing label in order for them to received it) invite is a great idea to consider instead of inviting them verbally. With this, they can feel that they are truly invited to one of your special events.