Mohamed Salah, who sustained a shoulder injury in late May, has trained with the rest of Egypt's national team for the first time since their arrival in Russia.
According to the French daily L'Equipe, it is yet unknown whether Salah will play in the Pharaoh's first game at the tournament against Uruguay on Friday.
"We'll wait until the last moment to decide whether he'll be in the line-up or not," national team doctor Mohamed Abou al-Ela was quoted as saying.
The Liverpool star damaged ligaments in his shoulder during the first half of their 3-1 defeat by Real Madrid in the Champions League final on 26 May following a challenge by Real captain Sergio Ramos.
The World Cup is set to take place from June 14 to July 15 at 12 stadiums in 11 Russian cities. Egypt's other two opponents in Group A will be hosts Russia and Saudi Arabia.