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… Chelsea star Jackson on Villa’s radar Chelsea’s Nicolas Jackson is among the names to have been suggested to Aston Villa.The Senegal international was considered by Villa last year when Chelsea first made noises about signing Morgan Rogers.Jackson is available for sale after returning from his loan at Bayern Munich.Villa have also enquired about West Ham’s Crysencio Summerville.The Hammers have rejected Roma’s opening bid of £35million for the Netherlands international but they are expected to return. Nicolas Jackson was considered by Villa last year when Chelsea first made noises about signing Morgan RogersFoxes stand firm on Nelson valuationLeicester City defender Ben Nelson has told the club he wishes to leave but their £10million asking price continues to deter suitors.Torino and Borussia Monchengladbach have both had offers rejected for the 22-year-old left-sided centre back who only has 12 months left on contract.West Ham and Manchester United have also expressed their interest in the 6ft 5ins defender who can also play left-back.Capped six times at England U20 level, Nelson made 27 appearances last season, scoring one goal. Leicester City defender Ben Nelson has told the club he wishes to leave amid interest from West Ham and Manchester UnitedLyon set price tag for Everton and Leeds target Lyon want at least £25million for attacking midfielder Pavel Sulc amid interest from Premier League clubs.Leeds United and Everton are looking at the Czech Republic international who had a stand-out first season in France.Lyon signed the 25-year-old from Viktoria Plzen last summer for £6.5m. Aston Villa had been following his progress prior to his transfer and he went on to score 14 goals and make eight assists in 38 appearances. Those impressive statistics have triggered interest across Europe.Sulc was part of his country’s World Cup squad in USA. Lyon want at least £25million for Czech midfielder Pavel Sulc amid interest from Everton and LeedsLiverpool close on Colombian youth star Liverpool are poised to complete the signing of Colombia youth international Samuel Martinez from Atletico Nacional for around £750,000.Daily Mail Sport reported in May about Liverpool’s efforts to sign the 17-year-old attacking midfielder amid competition from other European teams.He has travelled with his agent Daniel Neumüller to Merseyside to complete the formalities but won’t officially move to Liverpool until next summer after he has turned 18.Martinez, who was also wanted by Borussia Dortmund and Barcelona, will sign a five year deal.Liverpool are also adding centre-back Dara Jikiemi from Celtic and striker Michael Mulholland from Crusaders. Senegalese winger Sidy Barhama Ndiaye, who impressed on trial, is expected to arrive from Diambars FC in January 2028.Ipswich close to sealing £3.4m keeper dealIpswich are closing on a £3.4million deal for FC Volendam goalkeeper Kayne van Oevelen. Ipswich improved their offer after an initial £2.5m bid was rejected.The 22-year-old, who also had an offer from Valencia, is keen to make the move and is finalising terms.Ipswich want to get a deal and medical finalised before they fly to Spain for next week’s training camp in La Manga.