Novak Djokovic and Carlos Alcaraz will square off in a blockbuster French Open semifinal while Belarusian Aryna Sabalenka condemned outright her country's role in the Ukraine war on Tuesday after reaching the Last four at Roland Garros.

Djokovic, chasing a third French Open crown and record 23rd men's Grand Slam singles title, recovered from dropping his first set of the tournament to defeat 11th seed Karen Khachanov 4-6, 7-6 (7/0), 6-2, 6-4.

The 36-year-old Serbian is in his 12th Roland Garros semifinal — his 45th at the majors — and faces Alcaraz for a place in the final after the world No. 1 thrashed 2021 runner-up Stefanos Tsitsipas in straight sets.

"That's the match that a lot of people want to see. It's definitely the biggest challenge for me so far in the tournament," said Djokovic, who lost his only meeting with Alcaraz in Madrid last year.

"If you want to be the best, you have to beat the best. He's definitely a guy to beat here. I'm looking forward to that."

Djokovic fell behind for the first time this fortnight against Khachanov but dominated the second-set tie-break and then broke to begin the third set after a favorable bounce off the net.

Djokovic hit 19 winners and just one unforced error in the third set, conceding a solitary point on his serve before breaking the Russian again for good measure.

'That's the match that a lot of people want to see.'

He briefly let slip a 4-2 lead in the fourth set but immediately broke back and secured a ninth win in 10 tries against Khachanov with an ace on match point.

Alcaraz once more showed why he is the favorite with a convincing 6-2, 6-1, 7-6 (7/5) victory over Greek fifth seed Tsitsipas in the night session, easily navigating his stiffest challenge to date.

The 20-year-old Spaniard has won all five meetings with Tsitsipas and becomes the youngest Roland Garros semi-finalist since Djokovic in 2007.