Wimbledon tennis fans will have noticed something has changed this year, with final sets using tie breaks for the first time to decide matches.
Previously, final sets at Grand Slam events have gone on until one player wins by two clear games, meaning some contests have lasted hours and hours. But a new trial was announced in March, introducing a 10-point tie break to decide all final sets that reach six games all. The winner must win the tie break by two clear points.
This situation unfolded on Tuesday night, as Serena Williams was knocked out in the first round as a result of a final set tie break.
