It’s that time of the year again – the transfer window is now open until September 1 and it’s sure to be a busy period with clubs looking to make big signings ahead of next season.Here are today’s latest developments from Simon Jones and the Daily Mail Sport team… Blues sign England nemesisChelsea have completed the signing of Argentina midfielder Valentin Barco from sister club Strasbourg on a seven-year contract.The 22-year-old stirred controversy when his over-zealous celebrations of Argentina’s victory over England at the World Cup provoked an angry reaction from Jude Bellingham.Barco, who previously made six Premier League appearances for Brighton, has been signed following the exit of Marc Cucurella to Real Madrid earlier this summer but he has been playing in midfield.As Daily Mail Sport reported in May, he left for Chelsea at the end of the season, saying his farewells to Strasbourg supporters.Chelsea are also continuing negotiations with Rayo Vallecano for left wing back Pep Chavarria after making an improved offer. Chelsea have completed the signing of England World Cup nemesis Valentin Barco (right)Tractor Boys close in on new midfielder Ipswich Town are closing in on the £16million signing of Burnley midfielder Florentino Luis.As Daily Mail Sport reported last week, the Portuguese midfielder was leaning towards a move to Portman Road after they declared their interest even though Hull City had been in advanced talks over an initial loan for the 26-year-old.However, Hull City boss Sergej Jakirovic revealed over the weekend that they were set to miss out to a club that was willing to sign him on a permanent deal.Spurs target Liverpool starTottenham have made their interest known in Cody Gakpo but Liverpool have no plans to sell.Liverpool, who continue to work on a deal for Paris Saint-Germain’s Bradley Barcola, are looking to add attacking quality rather than lose it. Gakpo, 27, is one year in to a new long-term contract and with current market prices escalating for players of his experience, it would take a huge sum to change Liverpool’s stance.Tottenham are also keeping a watching brief on Omar Marmoush at Manchester City as well as negotiating for Savinho.Elsewhere, Cologne have asked to take Tottenham winger Mikey Moore on loan. The 18-year-old has a number of options including an offer to return on loan to Rangers. Newcastle’s new No 1 completes medical ahead of transfer Goalkeeper Lukas Hornicek has completed his Newcastle United medical in Spain, and is set to be announced as the club’s latest signing.Newcastle activated his £25.7m release clause and the player travelled to La Manga on Saturday.As Daily Mail Sport revealed, the 24-year-old Czech is being brought in as the club’s new first-choice option in goal. Lukas Hornicek has completed his medical ahead of joining Newcastle in a £25.7million dealBournemouth bolster full-back options Bournemouth have agreed an £11.2m deal with Sevilla for right-back Juanlu Sanchez.The deal is worth £9.5m plus a potential £1.7m in add-ons while Sevilla retain a 10 per sell-on.As Daily Mail Sport reported on Saturday, Bournemouth accelerated talks as they needed a right-back after the departure of Alex Jimenez to Fiorentina.The 22-year-old Juanlu is a Spain international with four caps and had interest from Everton. Wigan chasing Chelsea starlet Chelsea midfielder Reggie Walsh is wanted on loan at Wigan Athletic.The two clubs recently did business together when Chelsea completed the transfer of highly-rated 19-year-old midfielder Harrison Bettoni from Wigan on a four year contract.Walsh became Chelsea’s youngest player to feature in the Champions League last season and will be hoping to build on his senior breakthrough during the 2026-27 campaign.He figured briefly in the friendly defeat to Spurs in the Sydney Cup and was among several academy players involved as Xabi Alonso took charge of his first training session, alongside senior players such as Cole Palmer and João Pedro.Walsh has returned to pre-season looking physically bigger and stronger so Chelsea are keen to see how he copes with more competitive game time.Hammers chase former Spurs starWest Ham have joined the clubs showing interest in AZ Alkmaar striker Troy Parrott.Como, Ajax, PSV Eindhoven and Real Betis have already made enquiries.The former Tottenham academy graduate is in demand after scoring 31 goals last season.Alkmaar though are reluctant to sell the 24-year-old Republic of Ireland international to a rival Dutch club. West Ham have entered the race to sign former Tottenham forward Troy ParrottHull lead race for Norwegian starHull City are ready to fend off interest from Rangers and Cardiff City to sign highly-rated Norwegian midfielder Jens Hjerto-Dahl.Cardiff had offered a club record fee for the 20-year-old from Tromso but Hull are offering him the chance to play in the Premier League.The 6ft 4ins defensive midfielder has captained Norway at youth level and is an U21 international.Hull are also advancing in talks for 18-year-old centre back Lucas Herrington from Colorado Rapids and winger Mohamed-Ali Cho from Nice.Moore to go on loanCologne have asked to take Tottenham winger Mikey Moore on loan.The 18-year-old has a number of options including an offer to return on loan to Rangers.Click below for all the transfer developments over the last few days…SATURDAY: Man United star becomes target for Spanish clubFRIDAY: Newcastle agree deal for goalkeeper Lukas HornicekTHURSDAY: John Stones seals Inter Milan move WEDNESDAY: Man City push for World Cup wonderkid amid doubts over Rodri’s futureTUESDAY: Man United open to offer for four academy graduates MONDAY: Leeds close in on deal for James TraffordSUNDAY: Liverpool seek compromise on Bradley Barcola