The 33-year-old suffered a knock on his ankle during Los Blancos 2-2 draw against Barcelona at the Camp Nou in last weekend's El Clasico.
The Barcelona and Real Madrid pair, who have five Ballon d'Or awards each to their name, are still widely regarded as the two best players in today's game.
Ronaldo posted a picture on Twitter of himself in training, along with the caption: "Back on track".
Madrid travel to the Ramón Sánchez Pizjuán Stadium to face Sevilla on Wednesday, and Mundo Deportivo say the former Manchester United star won't travel with the squad and will also miss the next clash against Celta Vigo at home. "I'm not anxious about him for the Champions League final", Zidane said after his side's draw against Barcelona.
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He said afterward he felt this was a stepping stone for him. "Everything is going in", he said. "You're at TPC Sawgrass", he said. He still tied the record with a 9-under 63, and he had a five-shot lead, the largest in the 45 years of this tournament.
"It's a sprain, but there's not damage to the fibula". His ankle is okay. It's incredible that he's already walking after 48 hours.
According to Mundo Deportivo, a club source has told them "nobody at Real wants to contemplate" they will play the Champions League final without Ronaldo in the squad.
"Speaking to people in Madrid, he will be fit and ready for the final don't you worry about that", the former Liverpool winger said.
Salah's performances, which have helped Liverpool reach the final of the Champions League, also earned him the PFA Player of the Year award as he beat Kevin De Bruyne to the gong.
He was responsible for one of the goals that resulted in his side avoiding defeat at Camp Nou on May 6.