Jakub Mensik and Joao Fonseca meet on Monday night in a French Open quarter‑final that feels like a glimpse into the future of men's tennis.
Aged 20 and 19 respectively, both have already achieved so much in the professional ranks with the promise of plenty more to come.
Fonseca became the headline act of the tournament by knocking out three-time champion Novak Djokovic in thrilling fashion in round three.
The Brazilian backed it up with another fine performance against two-time Roland Garros finalist Casper Ruud on Sunday and enters this quarter-final as the favourite.
Meanwhile, Mensik looked close to exhaustion and elimination in round two before somehow finding a way to win the final set tie-break against Mariano Navone.
The 6ft 5in powerhouse recovered to beat No.8 seed Alex de Minaur in the last 32 and then held his nerve to oust Andrey Rublev in five sets on Sunday night.
The winner goes on to face either No.2 seed Alexander Zverev or Spanish teenager Rafael Jodar in the semis, so the stakes could hardly be higher for two players entering their first Grand Slam quarter-final.
Jakub Mensik v Joao Fonseca Tips Summary
Best Bet - Over 38.5 games @ 10/11
Alternative Bet - Joao Fonseca to win 3‑2 @ 5/1
Bet Builder - Joao Fonseca first break of serve, Jakub Mensik to win Set 1 7‑5 or 7‑6 & Joao Fonseca to win From behind @ 25/1
Jakub Mensik v Joao Fonseca Prediction
Best Bet: Over 38.5 games @ 10/11
Contrasting styles make fights in boxing and the same can be true of tennis, with this one promising so much on paper.
Mensik's powerful first serve has helped him out of some tough spots and he has served an impressive tally of 36 aces across his four matches this fortnight.
But that has perhaps overshadowed his brilliant return game, with 42% of receiving points won and 196 winners hit.
Fonseca's brilliant forehand has arguably been the tournament's biggest weapon and Mensik will have to be careful not to leave himself open to some of the Brazilian's crushing cross-court swipes.
But the Czech Republic star's two-handed backhand has been getting the job done too and that could lead to some spectacular rallies.
Both players are elite servers for their age, both are comfortable grinding from the baseline and both have shown remarkable mental resilience throughout the fortnight.
So, the chances of them slugging it out for more than 38 games look strong.
Mensik has played two five-set matches in Paris with an average of 38.5 games per outing. Fonseca has also twice been taken to a decider, with his matches averaging a whopping 43.5 games.
Alternative Bet: Fonseca to win 3‑2 @ 5/1
Half of the 24 men's matches in the third and fourth rounds lasted five sets and that trend could continue on Monday evening.
Mensik showed remarkable resilience to stay alive in the tournament when struggling with cramps in 33-degree heat in round two.
And the Czech star's powers of recovery enabled him to come back from a first-set bagel against De Minaur to book his place in round four.
But he has not faced a player with as much clay-court game as Fonseca, whose topspin forehand allows him to dictate rallies from behind the baseline in a similar manner to Spanish greats Rafael Nadal and Carlos Alcaraz.
The Brazilian has shown better stamina in long matches, twice coming from 2-0 down against Dino Prizmic and Djokovic.
He is more likely to grind Mensik down over the course of a long match than the Czech is to blow him away with some early pressure.
A 3‑2 Fonseca win fits the profile of Mensik starting strong, the Brazilian adapting and his stamina making the difference in the final set.
Jakub Mensik v Joao Fonseca Bet Builder
Joao Fonseca to make the first break of serve
Jakub Mensik to win Set 1 7‑5 or 7‑6
Joao Fonseca to win from behind
Pays: 25/1
Fonseca has been broken first in three of four matches in Paris, but served much better against Ruud on Sunday.
The Brazilian did not face a break point until his fifth service game and had already broken the Norwegian twice by then.
The first break of serve may not come until the second set of this contest, with both players serving well enough to take the opener to a tie-break.
In that case, take Mensik to edge a nerve-jangling 13th game because his 62.1% tie-break win-rate trumps Fonseca's 52% on tour this past year.
The teenager has overturned two 0-2 deficits to make it this far in Paris and also battled back to win from a set down the last time he faced Mensik, so taking the Brazilian to win from behind looks to be a good angle.
Key Match Stats
Mensik has struck 36 aces across his four matches at Roland Garros.
Fonseca has twice come from two sets down to win in Paris.
Mensik has won 78% of first‑serve points in Paris.
Fonseca has broken serve 21 times in four rounds.
Both players are making their Grand Slam quarter‑final debuts.
Fonseca defeated Casper Ruud, a two‑time Roland Garros finalist, in Round 4.
The Brazilian won their only previous meeting, two years ago, in five sets.
Read more tennis betting tips and predictions on site.
This article was written by a partner sports writer via Spotlight Sports Group. All odds displayed on this page were correct at the time of writing and are subject to withdrawal or change at any time.
