Explain the pattern of scoring in the game of tennis.

Scoring in tennis: 1. A game is won by the first player to win four points with a lead of at least two points. 2. Points are called: no point = Love, first = 15, second = 30, third = 40, fourth = game. 3. If both players reach 40, it is called Deuce; the next point gives Advantage, and the player with the advantage who wins the next point wins the game. 4. A set is won by the first player to win six games with a lead of at least two games; at 6 all a tie-break is played. 5. A match is the best of three or five sets.