What is the minimum number of points required to win a tennis tie break?

Question

If the first day's play of a five day test match is completely lost to rain, what is the minimum lead required for the team batting first to enforce a follow on?

Answer 1

Seven points

A tie-break set is played with the same rules as the advantage set, except when the score is tied at 6–6, a tie-break game (or tiebreaker) is played. Typically, the tie-break game continues until one player wins seven points by a margin of two or more points.