Novak rallied from a set down and saved three match points en-route to a 2-6, 7-6 (8), 6-1 win over third seed Gael Monfils. He will face Stefanos Tsitsipas (GRE, 2) in Saturday's final.
Nole recorded a 7-6 (1), 6-4, 6-3 victory over Roger Federer in their 50th career H2H match (27-23). The Serbian star will face Dominic Thiem (AUT, 5) in Sunday's final, looking to win his eighth Australian Open crown.
Lajovic and Djokovic clinched the team's fifth consecutive victory at the ATP Cup and booked them a place in the inaugural title match. Serbia will face Spain in Sunday's final.
Novak continued pursuit of his fifth title at the Rolex Paris Masters, following a 7-6 (5), 6-4 victory over Grigor Dimitrov. The Serbian star reached 50th ATP Masters 1000 final of his career. He will meet Denis Shapovalov in Sunday's final.
Fourth seed Dominic Thiem beat 2016 titlist and top seed in semi-final action at Roland Garros. The Austrian completed the third career victory over Novak, 6-2, 3-6, 7-5, 5-7, 7-5 in the match that lasted four hours and 13 minutes, spanning across two days
Novak beat Diego Schwartzman 6-3, 6-7 (2), 6-3 to move into the championship match of the Internazionali BNL d’Italia, which will be his 49th ATP Masters 1000 final. Next up is Rafael Nadal (ESP, 2)
Nole will compete in his third Mutua Madrid Open final after defeating no.5 seed Dominic Thiem 7-6 (2), 7-6 (4). The Serbian star is trying to tie Rafael Nadal's record of 33 ATP Masters 1000 trophies. Next up for Djokovic is Stefanos Tsitsipas (GRE, 8) on Sunday at 18:30 CET