Separate two scoreboards
A conventional set displayed as 7–6 contains thirteen games. Its tiebreak point score may be shown in brackets. Those bracketed points do not turn a 7–6 set into a much larger ordinary games total.
A match tiebreak is another case
A deciding match tiebreak is a different format choice. Do not assign its points a games-total value without the bookmaker’s rule. The score format should be known before calculating a handicap.
Source and contract
World Tennis publishes scoring rules and approved alternatives. Those rules explain the sporting result. Bookmaker conditions determine the settlement of a specific bet, including interruptions and special formats.