You definitely want to base your tennis racquet buying decision on your skill level too. Here are some examples. You probably don’t need to buy a $200 tennis racquet if you just want to go out and volley some balls with a friend to see if you like the sport. Also, if you are an advanced player who likes a little extra power and a racquet that helps you put you more spin on the ball as you return it, then a $70 tennis racquet is probably not going to fulfill that need.
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A tie-break set is played with the same rules as the advantage set, except that when the score is tied at 6–6, a tie-break game (or tiebreaker) is played. Typically, the tie-break game continues until one side has won seven points with a margin of two or more points. However, many tie-break games are played with different tiebreak point requirements, such as 8 or 10 points. Often, a 7-point tie-breaker is played when the set score is tied at 6–6 to determine who wins the set. If the tiebreak score gets to 6-6, then whichever player to win the best of two points wins the set. 
Tennis is a racket sport that can be played individually against a single opponent (singles) or between two teams of two players each (doubles). Each player uses a tennis racket that is strung with cord to strike a hollow rubber ball covered with felt over or around a net and into the opponent's court. The object of the game is to maneuver the ball in such a way that the opponent is not able to play a valid return. The player who is unable to return the ball will not gain a point, while the opposite player will.