|Australian Open 2023|
|Venue: Melbourne Park Dates: 16-29 January|
|Coverage: Commentary every day from 07:00 GMT on BBC Radio 5 Sports Extra 'Tennis Breakfast' live from Melbourne, with selected live text commentaries and match reports on the BBC Sport website & app|
Can anyone deny Novak Djokovic a record-extending 10th men's singles title at the Australian Open?
Only one other top-10 seed remains at the semi-final stage, with 2022 champion Rafael Nadal and Casper Ruud among those to suffer early exits.
Of those still standing in Melbourne, 21-time Grand Slam champion Djokovic is the only major winner.
Despite being hampered by a hamstring injury, he has lost only one set in his four matches so far as he looks to make up for lost time after missing last year's tournament.
The former world number one, who was deported after his visa was cancelled in 2022, has not lost a match at the Australian Open since 2018.
Can anyone stop him this year?
- Linette into first major quarter-final aged 30
- Djokovic races past De Minaur and sets up Rublev tie
- I'd never left the US, now I'm in a Slam quarter-final - Shelton
American Paul awaits Djokovic in the semi-finals following his win over compatriot Ben Shelton.
The 2023 Australian Open is already one to remember for Paul, who is enjoying his longest run at a Grand Slam having never previously progressed past the third round.
The 25-year-old world number 35 defeated tour veteran Roberto Bautista Agut in four sets in the fourth round - his second triumph over a seed in Melbourne having earlier beaten another Spaniard, Alejandro Davidovich Fokina, in five sets.
Greek third seed Tsitsipas is the highest ranked player remaining in the draw and, after beating Jiri Lehecka in straight sets, is into his fourth semi-final in Melbourne in five years.
The 2021 French Open finalist, 24, had won 11 successive sets before he survived a fightback by Jannik Sinner in the fourth round.
He will face Karen Khachanov in the last four, a player he has never lost to in five previous meetings.
Russian 18th seed Khachanov, 26, is into his second major semi-final after recording his best Slam result at last year's US Open by reaching the final four.
Khachanov progressed to the Melbourne semis when his quarter-final opponent Sebastian Korda retired through injury with the score at 7-6 (7-5) 6-3 3-0.
Prior to this year's edition, Khachanov had never previously gone past the third round at the Australian Open.