Five-time winners Brazil’s preparations for the upcoming FIFA World Cup suffered a damaging blow on Sunday when their right-back Wesley was ruled out of the tournament with a left thigh muscle injury, leaving coach Carlo Ancelotti with limited coverage on that flank just six days before the Seleção's Group C opener against Morocco.The AS Roma defender suffered the injury during Brazil's friendly against Egypt on Saturday night in Cleveland. This was Brazil’s final friendly before their opener against Morocco. After picking up a knock, the defender was substituted in the 15th minute.The discomfort was quite visible as he left the field in tears. Later, it became apparent that the damage was serious enough to end his World Cup before it began.The Brazilian Football Confederation (CBF) later confirmed his injury. "The CBF regrets the injury. Wesley is a player much loved by the team and will always be considered an integral part of this squad as it aims for its sixth World Cup title," an official statement from CBF read.The 26-year-old had been the preferred option on the right flank after Vanderson, Brazil's other specialist right back, was also sidelined by injury ahead of the squad announcement.With both players falling prey to injuries, Ancelotti has called up Atalanta midfielder Ederson, 26, as the injury replacement, a move that raised immediate tactical eyebrows, as Ederson is not a defender and has spent his career exclusively in the midfield.The defensive crisisBrazil's defensive options at right back are now alarmingly thin. The squad does include the experienced Danilo, a veteran full-back who can operate on the right and St. Petersburg left-back Douglas Santos, who can fill in as an emergency option.But neither is deemed a natural first-choice right back like Wesley or Vanderson. Ancelotti's decision to bring in a midfielder rather than a defensive cover suggests he may be rethinking the tactical setup entirely and can switch to a different game plan.How Brazil might line up in FIFA World Cup 2026With no true right back remaining, Ancelotti faces a tactical dilemma. Here are the most credible routes available to him as he approaches the Morocco match in New Jersey on June 13:Danilo as a makeshift right-backThe Flamengo veteran slides to the right-back position in a familiar 4-2-3-1 shape, often played by Ancelotti. He provides reliable experience but a limited attacking threat.Danilo is 33, and he doesn’t possess the great pace like Wesley but could be a good fit for more defensive solidity.Three-man defenceAncelotti could shift to a 3-5-2 or 3-4-3, converting Danilo or Douglas Santos into a right wingback, which will give wider freedom. With the likes of Gabriel and Marquinhos available for the centre-back position, Ancelotti could opt for a three-at-the-back option.Another injury headache for the veteran manager is the ongoing uncertainty around Neymar.The 34-year-old forward, who was included in the squad after a remarkable two-and-a-half-year absence, did not travel to Cleveland with the rest of the group for the Egypt friendly. A calf injury has kept him sidelined, and his participation in the tournament opener remains in doubt.Brazil open their FIFA World Cup 2026 group C campaign against Morocco on June 13 before facing Haiti and Scotland later in the tournament.