Real Madrid striker Ronaldo will be sidelined between two and three weeks with a thigh injury, Spanish paper Marca reported on Tuesday. The 30-year-old star tore muscular tissues in his right thigh during his side's 1-1 draw with Real Sociedad on Sunday when he scored Real's only goal. Ronaldo's celebrations with his 100th goal with the Royal club were marred by the injury that forced him to leave the pitch in the second-half of the game. Ronaldo split the fourth place in the La Liga top sorcerers list with Real Zaragoza's Diego Milito on 14 goals each.