Men's semi-finals at French Open - listen to live radio commentary at top of page (UK only)
LIVE: Alexander Zverev drops third set 6-3 against Jakub Mensik but only one set from final
Second seed Zverev is favourite to win first Grand Slam title after losing three finals
Czech 20-year-old Mensik bidding for a first major final
Followed by: Flavio Cobolli v Matteo Arnaldi (not before 18:00 BST)
World number 104 Arnaldi is lowest-ranked man to reach Paris last four since 1997
Zverev 7-5 6-2 3-6 3-0 Mensik*
Mark Woodforde
17-time Grand Slam doubles champion on BBC Radio 5 Sports Extra 2 and BBC Sounds
I am really encouraged to see Alexander Zverev play.
He is willing to risk moving forward, and it puts the onus on Jakub Mensik to come up with something grand.
The scoreboard pressure is singing loudly.
Zverev 7-5 6-2 3-6 3-0 Mensik*
Naomi Broady
Former British player on BBC Radio 5 Sports Extra 2
Alexander Zverev is a man on a mission. I think he wants this so much, and he has obviously had that conversation that nothing is going to distract him out there.
Zverev 7-5 6-2 3-6 3-0 Mensik*
Image source, Getty ImagesAlexander Zverev plants back-to-back groundstrokes, one off either wing, into the net to trail 15-30.
He recovers to lead 40-30 - including a fine body serve which Jakub Mensik can only return long - and thinks he's clinched the game with a shot from Mensik drifting into the tramlines.
He's called back by umpire James Keothavong as he heads to his chair - "it's good, Alex" - but wins the replayed point.
*Zverev 7-5 6-2 3-6 2-0 Mensik
Naomi Broady
Former British player on BBC Radio 5 Sports Extra 2
Sustaining your intensity and holding your level of focus, but the smallest blink can make such a difference. What a cushion Alexander Zverev has now.
*Zverev 7-5 6-2 3-6 2-0 Mensik
Image source, Getty ImagesThat's a poor shot from Jakub Mensik, who puts his hand to his mouth after sending a routine backhand a couple of feet long. Alexander Zverev mis-hit his return but the bounce for Mensik wasn't especially unkind.
Zverev 7-5 6-2 3-6 1-0 Mensik*
Jakub Mensik plants a tired backhand in the net.
Alexander Zverev has been clinical with his break point opportunities in this match - can he strike early in the fourth?
Zverev 7-5 6-2 3-6 1-0 Mensik*
A couple of unforced errors at 30-15 and 40-30 from Jakub Mensik... we're going to deuce.
Zverev 7-5 6-2 3-6 1-0 Mensik*
Naomi Broady
Former British player on BBC Radio 5 Sports Extra 2
Jakub Mensik has to be careful that he doesn't start to overplay the drop shots.
Zverev 7-5 6-2 3-6 1-0 Mensik*
Alexander Zverev holds to 15 to open the fourth set. A confidence-boosting ace for 40-0 and an unreturned serve to close out the game.
Image source, Getty Images*Zverev 7-5 6-2 3-6 0-0 Mensik
Mark Woodforde
17-time Grand Slam doubles champion on BBC Radio 5 Sports Extra 2 and BBC Sounds
That was a massive last point. A combination of why Jakub Mensik is a dangerous player - that power, then a lovely touch to finish.
*Zverev 7-5 6-2 3-6 0-0 Mensik
Oh ho! Another drop shot, coming at the end of a lengthy baseline exchange, leaves Alexander Zverev flat-footed at the back of the court.
For only the second time at this year's tournament, Zverev has been taken to a fourth set. Jakub Mensik has been a player reborn since his medical timeout early in the third.
Zverev 7-5 6-2 3-5 Mensik*
In double-quick time, Jakub Mensik leads 40-0. And of course, it's a drop shot - this time from his backhand - which brings up set point.
Zverev 7-5 6-2 3-5 Mensik*
Naomi Broady
Former British player on BBC Radio 5 Sports Extra 2
Alexander Zverev is trying to make sure at the very least, he is serving first at the start of that fourth set.
Zverev 7-5 6-2 3-5 Mensik*
Image source, Getty ImagesThat's more like it from Alexander Zverev! He wallops a cross-court forehand winner from out wide for 30-0 and holds to love with a down-the-line winner off the same wing.
Over to you, Jakub.
*Zverev 7-5 6-2 2-5 Mensik
Naomi Broady
Former British player on BBC Radio 5 Sports Extra 2
It is completely different. The energy from the crowd has just rocketed.
*Zverev 7-5 6-2 2-5 Mensik
Image source, Getty ImagesJakub Mensik backs up the break with a hold to 15, much to the delight of the crowd.
Alexander Zverev's shoulders have drooped. He's going to have to serve to stay in the third set.
Zverev 7-5 6-2 2-4 Mensik*
Mark Woodforde
17-time Grand Slam doubles champion on BBC Radio 5 Sports Extra 2 and BBC Sounds
It is one of those moments where I am surprised. Everything was pointing towards Alexander Zverev comfortably taking control of this third set.
Zverev 7-5 6-2 2-4 Mensik*
Well, well, well. Jakub Mensik raises his fist after coming up with a forehand drop-shot winner.
Court Philippe-Chatrier erupts.
How will Alexander Zverev respond?
Image source, Getty Images*Zverev 7-5 6-2 2-3 Mensik
What was I saying about Alexander Zverev not facing a break point since the first set?
Well, here's one for Jakub Mensik - a well executed drop shot is just about retrieved by Zverev but the court is wide open for Mensik to put away the winner.
*Zverev 7-5 6-2 2-3 Mensik
Alexander Zverev gets a bit frustrated with himself after a run of unforced errors help Jakub Mensik hold to love. He was tetchy in the previous game too when one of his serves was given out.
He needs to make sure he keeps his composure here - he's two sets up after all.
Image source, Getty Images
