England can still make changes to their World Cup squad but must follow strict FIFA rules.The Three Lions begin their group stage campaign against Croatia on Wednesday, June 17.Tuchel can still call a replacement into his England World Cup squadGettyMeanwhile, Thomas Tuchel named his final 26-man squad for the tournament last month.However, the England boss is still permitted to call-up a replacement in the event of an injury or illness to one of those players.Fans will be hoping to avoid any injury-enforced changes, though, after the Three Lions came through Saturday’s friendly with New Zealand unscathed.If a player is injured against Costa Rica on Wednesday, however, they can still be replaced in the side.World Cup replacementsFIFA’s World Cup squad rules allow one injury replacement to be made up to 24 hours before a team’s opening match.For England, their first fixture is a 9pm kick-off against Croatia on June 17.The injury replacement must have been named in their 55-man provisional squad submitted to FIFA before the final list was announced.No further players can be called into the squad once the deadline has passed.Several nations have already been forced into changes prior to the start of the tournament.Germany’s Lennart Karl has been ruled out through injury, with Assan Ouedraogo replacing the Bayern Munich youngster.Ngumoha is ineligible for a place in the World Cup squad as he was left off the provisional listGettyWorld Cup WhatsAppDon't miss an update from talkSPORT in our dedicated World Cup WhatsApp channel.Search for ‘talkSPORT World Cup’ in your ‘Updates’ tab on WhatsApp and we’ll drop the proper, unfiltered football chat straight to your lock screen—no fluff, just pure talkSPORT energy.It’s where you’ll find out all the new rules to watch out for, England and Scotland reaction and big match player ratings. Plus there will be loads of debates on the biggest talking points as Haaland, Mbappe, Kane and the biggest names in football descend on America, Canada and Mexico.Meanwhile, Bournemouth defender Marcos Senesi is in contention to join the Argentina squad in place of the injured Leonardo Balerdi.England have previous experience with the rules on injury replacements.In 2010, Michael Dawson replaced captain Rio Ferdinand, who withdrew from the squad through injury before the tournament.However, they were unable to replace Ben White in 2022 as he left the World Cup squad following the conclusion of the group stage.Who can England call-up?Only Alex Scott and Jason Steele are eligible to be called into the squad from those additional players currently with the side.The pair have joined their England team-mates in Florida for the pre-tournament training camp alongside Rio Ngumoha, Ethan Nwaneri and Josh King.Scott is amongst those who were included in the 55-man provisional squad by TuchelGettyEngland World Cup squadJordan PickfordEzri KonsaNico O’ReillyDeclan RiceJohn StonesMarc GuehiBukayo SakaElliot AndersonHarry Kane (C)Jude BellinghamMarcus RashfordTino LivramentoDean HendersonJordan HendersonDan BurnKobbie MainooMorgan RogersAnthony GordonOllie WatkinsNoni MaduekeEberechi EzeIvan ToneyJames TraffordReece JamesDjed SpenceJarell QuansahWhilst Scott and Steele were in the 55-man provisional squad, Ngumoha, Nwaneri and King were not included.Steele is set to remain with the squad as a training goalkeeper throughout the tournament.Meanwhile, Ngumoha will be ineligible for a call-up despite his man of the match performance against New Zealand.The likes of Danny Welbeck, Luke Shaw and Trent Alexander-Arnold are understood to have been on Tuchel’s 55-man provisional list of players.Scott is yet to make his senior England debut after the Bournemouth midfielder was an unused substitute on Saturday.His Cherries teammate Tyler Adams, who is set to be a star with the US Men’s National Team, believes he would be ready for that opportunity if it came.Adams told talkSPORT: “He had a great season. I think he took a huge step forward. We could all see the talent that he had and what he’s capable of.“He’s been my partner in the midfield now for the entire season for the most part. We balance really well next to each other. “Like I told him, going into that England camp, anything can happen. You have to be ready for your opportunity if it comes.”He could still feature against Costa Rica, though, with the Three Lions back in action at 9pm on Wednesday, live on talkSPORT.