Chelsea are currently leading the race to sign Bournemouth's Nathan Ake, who have a £40 million buyback clause.
The £40 million buyback clause means that Frank Lampard can bring Ake to Stamford Bridge without having to start negotiations with Bournemouth.
Eddie Howe has stated that he will be unable to keep Ake at Bournemouth if he wishes to leave, saying that "Some of these things are out of our control."
He also said that "Obviously, we will be doing our best to be as strong as we can into the second half of the season."
Chelsea had sold Ake to the Cherries for £20 million back in 2017, after he had spent the second half of the 2016/17 season on loan at the club.
Since he joined the club permanently, Ake has proven to be quite a good defender going forward, not just defensively, getting eight goals in his 100 Premier League appearances so far.
Ake was sold by Antonio Conte in 2017 despite being seen as one of Chelsea's brightest prospects.
Manchester City and Tottenham are also interested in the Dutchman, with City looking for defenders and Spurs needing a replacement for Jan Vertonghen.