Second seed Alexander Zverev accelerated his march through the Australian Open on Friday with a straight-sets takedown of Briton Jacob Fearnley in the third round
Aryna Sabalenka will begin her quest for a historic third consecutive Australian Open crown when the first Grand Slam of the year begins on Sunday.
Kazakhstan shocked Germany and advanced to the semi-finals of the United Cup.
Elena Rybakina's Kazakhstan dumped defending champions Germany out of the United Cup on Wednesday with world number two Alexander Zverev sidelined by an arm injury barely a week away from the Australian Open.
Fritz is set to face either Jannik Sinner or Casper Ruud in the final on Sunday.
Alexander Zverev secured a spot in the last four of the ATP Finals on Friday with 7-6 (7/5), 6-4 victory over Carlos Alcaraz which leaves the Spaniard's destiny out of his hands.
World No. 3 Alcaraz beat Rublev 6-3, 7-6 (10/8) to lift himself off the bottom of the John Newcombe Group.
Alexander Zverev opened his campaign at the ATP Finals in Turin on Monday evening by dispatching Andrey Rublev 6-4, 6-4 in their round-robin opener.
Germany's Alexander Zverev won the Paris Masters on Sunday by defeating home hope Ugo Humbert 6-2, 6-2 in a dominant display by the new world number two.
Alexander Zverev beat fierce rival Stefanos Tsitsipas in the quarter-finals of the Paris Masters on Friday, while Holger Rune edged Alex de Minaur to keep alive his hopes of reaching the ATP Tour Finals.