Football transfer fees are getting crazy. In a world where PSG are splashing £200m on Neymar, and Barcelona are chucking £277m on Ousmane Dembele and Philippe Coutinho, the question is who will be the first player that a club splashes £1bn or more on.
Here are six potential contenders to become that player...
6. Harry Kane (Tottenham)
2017 saw Harry Kane score more goals than any other European forward and his continuous exploits in the Premier League and Champions League have attracted the attention of Real Madrid and Manchester City.
With Spurs repeating the trend of failing to deliver silverware last season the Lilywhites will have their work cut out to hang onto the ambitious striker should they fail to win anything this season.
With trophies certain to come elsewhere and Daniel Levy rating the player at around £200m, Kane's remarkable goal record could see a big gun pull the trigger and splash the crazy £1bn for his services up front.
5. Gabriel Jesus (Manchester City)
It's crazy to think Gabriel Jesus hasn't hit the big 21st yet. The Brazilian striker has taken to life in England like a duck to water with an impressive 17 goals in 36 games for City, and still has years ahead of him.
The Brazil international will undoubtedly get better with the immense talent around him in Manchester and with Sergio Aguero moving into his 30s, it's likely Pep Guardiola will be more dependant on him for the years to come.
That could well mean more and more goals for Jesus and his stock going up, which could lead to a European giant targeting him in a few years time. Could City be the one to succumb to a ludicrous transfer fee and wave goodbye to one of their star players? With the potential Jesus has, very much yes.
4. Ousmane Dembele (Barcelona)
At 20 years of age, French winger Ousmane Dembele has achieved a lot. Sensational seasons at Rennes and Dortmund led him to becoming the world's second most expensive player with a move to Barcelona. An injury has derailed his progress at the Nou Camp slightly but there is plenty of time for him to excel with the likes of Messi, Suarez and now Coutinho to give him service.
A very decent 22 goals in 79 senior club games, Dembele is likely to be a key component in Barca's future and could well exceed what is already an impressive CV at his age. Brought for £135m by the Catalans, Ousmane Dembele could follow Neymar out the door for even bigger money if he truly fulfils his potential.
3. Christian Pulisic (Borussia Dortmund)
Still a teenager, USA winger Christian Pulisic has established himself as one of the standout players for both club and country in the last couple of years. His superb performances have led the world to stand up and take notice as Pulisic's stock continues to rise game by game.
Let's not forget of course, BVB are not afraid to let their star men leave and if Pulisic continues to impress and the most ridiculous of £1bn bids comes in, would a club that allowed Robert Lewandowski join Bayern for free decline? Absolutely not. A young star with great potential, Pulisic could take the reputation of USA internationals to new heights in the coming years.
2. Marco Asensio (Real Madrid)
Marco Asensio has been one of the great stories of Zinedine Zidane's tenure as Real Madrid manager after a string of brilliant, important goals. The Spaniard has continued to improve with 17 goals in two seasons for Los Blancos and has already won four major trophies at the Bernabeu and earned eight caps for his country.
Just 21, the attacker has plenty of years ahead of him to get even better and potentially step into the boots of Cristiano Ronaldo as a long term replacement as the star man. However, stepping up to be the main man could lead to some outstanding years for Asensio and maybe, just maybe, an insane big money move when he truly reaches his prime in Madrid.
1. Kylian Mbappe (PSG)
Already regarded as one of the best players in the world, the electrifying Kylian Mbappe has already earned himself a big money move to PSG and has become one of the most consistent forwards in the world with incredible goalscoring records for club and country.
Still a teenager, to say he has time to get even better is an understatement. 41 goals in 82 games in his career so far makes one of the deadliest strikers in Europe already, so the potential level of performance he could reach in the next four years or so is scary. If anyone is going to be the first £1bn player, it's certainly this lad.