Wonderkid Erling Haaland has already joined Manchester City from Borussia Dortmund too and there have been plenty of rumours linking some of the biggest players in world football with huge transfers.
Kylian Mbappe looked set to be one of those, with a deal to join Real Madrid looking all but done, before he sensationally signed a new contract with Paris Saint-Germain.
But there will be plenty of other massive transfers when the window opens next month, and talkSPORT has taken a look at the blockbuster names who could be on the move.
Robert Lewandowski
Lewandowski has confirmed that his time with Bayern Munich is 'over' after eight years with the German giants.
He is one of the most prolific frontmen in world football and will be targeted by a number of top teams who are looking for a goalscorer this summer.
Barcelona and Chelsea have both been heavily linked with a move for the player, with Liverpool also touted as a potential destination.
Despite being 34 years old, a player that has scored 344 goals in 375 games over the last eight seasons will be in high demand when the transfer window opens.
Paul Pogba
After re-signing for Manchester United for £89million in 2016, Pogba is set to leave the club on a free transfer for a second time this summer.
A disappointing return to Old Trafford means the club have decided not to offer the Frenchman a new deal.
And, despite a poor few seasons back in England, there are plenty of clubs reportedly keen on signing the midfielder.
His former club Juventus are said to be the favourites to sign him but, as his move to Man United has shown, perhaps it's best not to return.
Ousmane Dembele
Pogba's international teammate Dembele could also be on the move after a similarly underwhelming big-money transfer.
He joined Barcelona for £135m from Borussia Dortmund five years ago but injuries have stopped him from fulfilling his potential.
Reports state that the 25-year-old could be one of the first signings of Todd Boehly's reign as Chelsea owner.
PSG have been heavily linked with bringing him back to France, however, which could see him replace Angel di Maria, who Juventus are targeting on a free transfer.
Frenkie de Jong
Manchester United have a big summer ahead and De Jong has been tipped to reunite with new Red Devils boss Erik ten Hag.
The duo worked together at Ajax and, with Barcelona in well-documented financial difficulties, they could be keen to sell the midfielder to fund other moves this summer.
The Dutch international is a midfielder that United fans have been crying out for and, after years of Fred and Scott McTominay in the centre of the park, he could excite supporters ahead of next season.
But other players are said to be a priority for the United board, with the likes of Jurrien Timber and Darwin Nunez also linked.
Gareth Bale
One of the biggest names who could move this summer is Bale, who has just won his fifth Champions League winners medal after Real Madrid's 1-0 victory over Liverpool.
The bookies have Championship club Cardiff as the favourites to sign him, which could be an incredible addition for the Welsh side.
Bale grew up as a fan of the Bluebirds and plays home games for the Wales national team at the Cardiff City Stadium.
Ahead of the World Cup at the end of the year - which Wales can qualify for when they face either Scotland or Ukraine on Sunday - boss Robert Page said a move to the second-tier side 'makes sense' and 'ticks all the boxes'…