Aubameyang, Drogba and Zabaleta and more have all been linked with moves to and from the biggest clubs in the Serie A
Here are 5 talking points from Barcelona's 1-2 victory against Borussia Monchengladbach.
Barcelona emerged as the victors from a thrilling encounter at Borussia Park as they came back from behind to beat Borussia Monchengladbach 1-2 in their Champions League tie.
It was a visual treat for football lovers on Tuesday night as Real Madrid and Borrussia Dortmund battled it out for all three points in one of football's greatest arenas.
Dortmund have reportedly informed the Real Madrid hierarchy that the Santiago Bernabeu is Aubameyang's destination of choice and business could be done, should an appropriate offer be tabled
Napoli aren't willing to let go of their star man, but they would be forced to consider a €45 million offer if it were to come their way. The 25-year-old would certainly be a significant improvement on Medhi Benatia, who has signed for Juventus.
Barcelona midfielder Arda Turan could be sold to Borussia Dortmund, to make way for Valencia's Portuguese star Andre Gomes to join the Catalan giants.
Borussia Dortmund's Henrikh Mkhitaryan is edging closer to a move to Premier League giants Manchester United.
The 26-year-old has never been able to establish himself in the first team squad since making his debut in 2011 and has always found himself behind Marcelo and Carvajal in the pecking order.
Real Madrid, Paris Saint-Germain and Manchester City are three of the richest clubs in world football. Their financial backing is unrivalled in the modern game and their ability to buy the best players in the world has given them the competitive edge over domestic rivals.