De Gea has 2 years left on his United contract.
Chalobah has made 10 appearances in the league for Chelsea.
Benfica right-back Semedo becomes Barcelona's first signing of the summer.
Virgil van Dijk has been among Southampton's best players.
Bakayoko will become Chelsea's third major signing of the summer.
The Reds have offered the Argentina youngster a five-year deal worth £2.49m a year.
The 35-year-old held a four-hour meeting with agent Mino Raiola and confirmed "huge" announcement is imminent.
French defender has signed a new five-year deal with the reigning Ligue 1 champions.
Eagles unwilling to meet £30m valuation for player of the season contender despite successful loan stint.
EU's chief Brexit negotiator also met with Welsh First Minister Carwyn Jones and SNP chief Nicola Sturgeon.
The Catalans have €60m net to spend on improving their squad says the club president.
Welsh international, along with Simon Mignolet, was not involved in the friendly win at Tranmere.
The Monaco midfielder underwent knee surgery at the end of last season and could miss start of the season.
Spurs hope to thrash out agreement when they meet with Sporting Lisbon directors and Silva's agents.
Defender Foyth played for Argentina in the Under-20 World Cup last month.
The Catalan giants have given up on their attempts to sign Hector Bellerin from Arsenal.
Swans say that key playmaker "did not feel in the right frame of mind" to travel amid uncertainty over future.
The Reds boss jokes there is "no chance" of signing any further players.
Piero Ausilio says Inter have not taken United's offer into consideration.
Unpopular Italian defender is "already out", according to Whites boss Thomas Christiansen.
However, French striker insists he will remain professional as speculation over his future continues to swirl.
Tottenham's Dier was Mourinho's primary midfield target this summer.
Reports in Spain suggest the striker is now focused on staying at Real Madrid.
Thousands of students fled to the Drake Stadium on Wednesday night.
Mohamed Salah and Dominic Solanke have been the club's only signings this summer.
Chelsea are believed to let Matic leave after they complete Tiemoue Bakayoko signing.
Domingos Quina is currently preparing to play for Portugal in the U19 Euro final.
Spurs manager Mauricio Pochettino intends on keeping Dier at the club.
The Italian club also have the option of signing Costa on a permanent transfer for €40m.
Bakayoko will become Chelsea's third first-team signing following the arrival of Caballero and Rudiger.