The Australian Open has followed Wimbledon by introducing final-set tie-breaks for matches at next month's tournament.
But, while Wimbledon will have a standard first-to-seven-points tie-break at 12-12, Australian Open matches which go the distance will be decided by a first-to-10-points tie-break at 6-6.
The US Open was the first grand slam to introduce final-set tie-breaks, with a first-to-seven-points game played at 6-6, meaning the three tournaments will all use a different format. The French Open is now the only slam to use a long deciding set.
The news comes at the end of a year where the divisions between tennis' various governing bodies have become significantly more entrenched despite pledges to work together in the interests of the sport.