What is the term when a tennis game is tied at 40-40? is it love or advantage or deuce or match?

When the hand moved to 60, the game was over. However, in order to ensure that the game could not be won by a one-point difference in players' scores, the idea of "deuce" was introduced. To make the score stay within the "60" ticks on the clock face, the 45 was changed to 40.

Deuce ( advantage out )

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