The tennis rivalries we never got to see: Nadal vs Alcaraz, Federer vs Sinner and more

It is fair to say that tennis has been blessed with some tantalising rivalries throughout the years. Ranging from the ‘Big Three’ regularly locking horns, Bjorn-McEnroe, Sampras-Agassi, Navratilova-Evert, Serena Williams–Venus Williams, Alcaraz-Sinner to name a few.

All some have one thing in common: they are some of the best players to have graced the sport, regularly competing on the big stage for the most prestigious and coveted titles tennis has to offer and winning them in masses.

Each of these greats ruled over in their respected eras, normally there being a few in the men’s and women’s game clashing on a regular basis in some tennis classics that give birth to these bitter rivalries.

Currently, the most prominent one is Alcaraz and Sinner, who have faced off in countless Grand Slam and Masters 1000 finals in the past few years, hushed slightly in 2026 due to untimely injuries and surprising results.

But there is always the question of how these tennis players would fare in a different generation. Would Alcaraz cope with McEnroe’s serve and volleying. How would Aryna Sabalenka’s devastating power match up against a prime Serena Williams. Would Sinner stand a chance against prime Roger Federer on Centre Court. All of these questions will never be answered, but it is an interesting topic of conversation that let tennis fans imagination run wild.

Two Spanish maestro’s who paths crossed at the complete opposite times in their careers who would have delighted a whole generation with their skill on the court. While Alcaraz is one of the top players in this current world we live in, there was a time where his Spanish predecessor was the one on top in a much different landscape.

If these two were to match up in their prime, the elephant in the room would be the chosen surface. Clay is Alcaraz’s favourite and possibly strongest surface, but even him at his absolute best may struggle to contain Nadal at Roland Garros.

The huge forehand with an abundance of top spin would pin Alcaraz back on the backhand, no matter what surface this is being competed on. This would open the court as he routinely would then come in for the kill.

This with most opponents would be a job well done, but with Alcaraz the task may be a little bit harder. The 23-year-old himself can generate a huge amount of power, especially also on that forehand side which is one of his many strengths. There is the danger that he gets on top in the rallies and puts Nadal on the defensive, against the run of play. On his day, he could also resist the pressure that the 22-time Grand Slam champion puts on him. That added variety so well utilised would give his opponent something to think about, possibly switching up the odds.

While Nadal was world class on all surfaces, clay was the one that stood out the most and he would be favourite against Alcaraz in Paris or Madrid, etc. However, on hardcourt or grass, there is an argument that the advantage would swing towards Alcaraz, although the margins are so slim. If his serve was on song, and in his prime you expect it would be, Alcaraz would be the one to beat on grass while on hardcourt there is a shot for the more youthful Spaniard if he can resist the power coming back his way, which is easier said than done.

Overall, Nadal would probably have the edge in the rivalry but there is still the argument that Alcaraz can surpass the level and achievements of his fellow countryman as the years go on, possibly swinging the pendulum the other way.

In his pomp, there were times that Federer looked completely unstoppable. In another reality, maybe a Sinner coming up against him would give him something else to think about.

When looking at the Sinner game, it feels like that is the one to test Federer the most compared to others. His baseline game would be difficult for Federer to combat, drawing him into longer rallies while all the time Sinner would continue to barrage him with some powerful shots. Whether on the forehand, backhand or the depth, he claw back at Federer’s aggressive nature on court.

The variety of Federer’s game would be something that tests Sinner. Trying to abrupt the point by coming into the net, slicing and taking the ball early, he can keep Sinner second-guessing about his next move while dictating the play, keeping the Italian darting around the court.

The overall feel is that grass and clay would have its outright favourites. A master on the grass, Federer has won more titles at Wimbledon (eight) than anyone else, trumping Sinner’s two albeit having a much longer career at this point in time. On clay, the narrative would slightly turn towards Sinner with it suiting the physical nature while allowing his big weapons to carry him over the finishing line.

This leaves hardcourt in which Sinner has also stamped his authority on, especially indoors. Federer would be a constant pest, messing up his baseline rhythm with his usual variety on court and could capitalise on this if the 25-year-old cannot settle. Overall, the rivalry would be extremely competitive across all three surfaces and would be a challenge for both. Federer may have the slight upper hand if Sinner is unable to deal with the variety on display, similarities brought up in the current day against Alcaraz. However, when both are in their peak conditions there is very little splitting the duo.

23-time Grand Slam champion Williams is widely recognised as one of, if not, the greatest female tennis player to ever grace the court. You just need to look at the trophies and titles won in her glorious career which to this day still continues following her well documented comeback.

This makes her the favourite against any player, including former World No.1 Swiatek. However, a Swiatek at her very best will offer a lot of grief to Williams in what would have been a rivalry for the ages.

There is no limit to Swiatek’s potential with her still only 25-years-old and with more gears to climb, something that has not been happening of late. Nevertheless, when at her absolute best she is a force to be reckoned with, even with the great Williams. The Pole’s forehand would be her most important weapon, generating a lot of spin to trouble the Williams game. This would be most effective on clay in a physical battle but could be made useful in any setting. However, that alone would not be enough to quieten Williams down.

In her pomp, Williams could get these high balls back mesmerically, dampening Swiatek’s game plan. This would call upon her seeking more variety in her height, direction and pace. For Williams, the power alone was enough to blow most players away. Taking the ball early would disrupt the rhythm of Swiatek. If she could dictate the game and rallies in not dragging out too long, she has the upper hand.

Her serve comes in crucial with this. A level above what Swiatek can produce, she is more effective at shortening rallies which even makes the second serve deadly. To combat this on the other side of the court is one of the most effective returners on the WTA Tour. This could allow Swiatek to prevent the Williams’ serve from being as big of a threat, but when switching the roles the six-time Grand Slam champion is then very vulnerable.

On clay, you would have to put Swiatek as the favourite. Grass is a completely different story with Williams likely to be the one to beat although Swiatek’s 2025 Wimbledon run shows her capabilities on the surface. Hardcourt would again lean to Williams, making her the person who would likely be on top in this imaginary rivalry. There is always the threat that Swiatek could cause a surprise from time to time, but the consistency and class of Williams cannot be dismissed.

The current World No.1 Sabalenka has built a reputation on the WTA Tour of being an absolute machine, hitting the life out balls with so much raw power. A playstyle like this would be fascinating against so many former greats of the game, but Maria Sharapova is one that could turn the tables.

Both players are similar to an extent. The power they can both generate from their trusted baseline positions are a reliable way of winning tennis matches. The power is more emphasised with Sabalenka with a thunderous forehand capable of blowing tennis players away, including Sharapova.

To battle against this, the Russian enjoyed a brilliant return game that could stifle out the much tinkered Sabalenka serve, another source of tremendous power. This is the key battle which can determine the contests. The first serve percentage needs to be high for Sabalenka to shorten the points and not allow Sharapova to get her nose in front on the second serve. From there, the five-time Grand Slam champion can drag rallies out longer which would suit her style more.

The mental side of these matches would be the killer blow, and this has been brought up in relation to Sabalenka's recent slip ups. Her poor form has resulted in some surprising collapses while a number of big final defeats do not look great on her CV. When at her best, she can be a great big-match player, as shown by her accolades, but compared to Sharapova this is crucial. A three-set match in a tense Grand Slam final favours Sharapova and turns her into a relentless monster on court.

If they had gone toe to toe in the same generation, Sabalenka's ability to create so much power would be the pivotal factor. She would cope better with the physical exchanges on clay with a peak Sabalenka on hardcourt a mesmerising viewing experience. Sharapova would possibly have the slight edge on grass, and you would be bold to rule her out completely on the other surfaces.

Overall, the fascinating about this is that Sharapova would be one of the few players that would not feel intimidated about the power of Sabalenka. There is one thing saying it and another playing against it, but that is a key factor that would make this rivalry one of the ages.