Former men's world number one Agassi has tipped Djokovic to win all four grand slams in a calendar year.
The British number one is now due to play against the United States at the Davis Cup Tie next month.
The couple will tie the knot on 11 April at the five-star Cromlix House Hotel, close to Murray's home town of Dunblane.
Murray matched the champion in a pulsating opening two sets before Djokovic took control.
Djokovic and Murray play in Melbourne, facing-off for the fifth time in a grand slam final.
Serena Williams has overtaken Martina Navratilova after she clinched her 19th Grand Slam title at the 2015 Australian Open.
Fans of Czech tennis star Tomas Berdych, offended by her foul-mouthed rant, said Sears 'deserved a couple of slaps' and 'should die.'
Sport editor Nick Howson previews the weekend's sporting action.
Kim, Amelie and Judy are the influential women behind the British number one.
Djokovic comes through in five sets to dump out the defending champion in Melbourne.
Kim Sears was caught on camera directing a string of expletives at Czech opponent Tomas Berdych's team.
The Britain reaches eighth grand slam final with four-set win in Melbourne.
The Russian will look to end a 15-match losing run against Williams in Saturday's final in Melbourne.
Berdych takes on Murray in the Australian Open semi-final in Melbourne.
Djokovic will be looking to avenge last year's quarter-final loss when he faces Wawrinka in the Australian Open 2015 semi-finals on Friday.