The Australian Open will use a 25-second shot clock and players may be fined for retiring or performing “below professional standards” in the first round of Grand Slams from next season.

The shot clock, trialled at US Open qualifying and the Next Gen ATP Finals, is used in between points to ensure players serve within 25 seconds.

It is one of a number of changes decided by the Grand Slam Board (GSB). The GSB is also intending to reduce Grand Slam seeds from 32 to 16 in 2019.

Source: BBC