Facts and figures ahead of Friday's Australian Open men's semi-finals (x denotes seeding):

Novak Djokovic (SRB x4) v Tommy Paul (USA)

Head-to-head: Never played before

Fast facts

Novak Djokovic

Age: 35

World ranking: 5

Prize money: $164,786,653

Career titles: 92

Grand Slam titles: 21

Australian Open best: Champion (2008, 2011, 2012, 2013, 2015, 2016, 2019, 2020, 2021)

Coach: Goran Ivanisevic

Path to the semi-final:

1st rd: bt Roberto Carballes Baena (ESP) 6-3, 6-4, 6-0

2nd rd: bt Enzo Couacuad (FRA) 6-1, 6-7 (5/7), 6-2, 6-0

3rd rd: bt Grigor Dimitrov (BUL x27) 7-6 (9/7), 6-3, 6-4,

4th rd: bt Alex de Minaur (AUS x22) 6-2, 6-1, 6-2

Quarter-final: bt Andrey Rublev (RUS x5) 6-1, 6-2, 6-4

Tommy Paul

Age: 25

World ranking: 35

Prize money: $3,721,250

Career titles: 1

Grand Slam titles: 0

Australian Open best: Semi-finals (2023)

Coach: Brad Stine

Path to the semi-final:

1st rd: bt Jan-Lennard Struff (GER) 6-1, 7-6 (8/6), 6-2

2nd rd: bt Alejandro Davidovich Fokina (ESP x30) 6-2, 2-6, 6-7 (4/7), 6-3, 6-4

3rd rd: bt Jenson Brooksby (USA) 6-1, 6-4, 6-3

4th rd: bt Roberto Bautista Agut (ESP x24) 6-2, 4-6, 6-2, 7-5

Quarter-final: bt Ben Shelton (USA) 7-6 (8/6), 6-3, 5-7, 6-4