On Sunday, Salah posted a message saying: "It was a very tough night, but I'm a fighter".
"Your love and support will give me the strength I need", former Roma and Chelsea player added.
Initial fears were that Salah would miss the entirety of the World Cup in Russian Federation, with the 25-year-old Liverpool forward believed to have been sidelined for up to three months.
It was 0-0 at the time, and Madrid went on to win 3-1 on Saturday.
Salah is Egypt's big hope to lead them into the World Cup, where they have been drawn in Group A along with hosts Russia, Saudi Arabia and Uruguay.
"We are going to do double session every day and we will try to reduce the recovery period".
But it has since emerged Salah sprained ligaments in his shoulder and could be fit in three to four weeks.
Egypt will have until the 4 of June to decide whether Salah will be eligible for the World Cup in the 23 man squad, after which no changes can be made.
"He is sad about what happened but he is totally focused on recovery and seeing when he can be ready". With Egypt qualifying for the tournament for the first time in 28 years, emotions in the country have been running high.
In an incredible first season with the Premier League club following his transfer from Roma past year, Salah broke a host of record as he scored 44 goals in all competitions.