Cristiano Ronaldo hit a hat trick as Real Madrid warmed up for its Copa del Rey clash with Barcelona by rolling to a 4-0 home victory over Getafe in the Spanish league on Sunday.
"I don't know if I fouled him or not," Carvalho said. "It all happened so fast. I jumped and I don't know if I touched him."
Ronaldo then scored three times in an 11-minute span to give him 21 goals in league play this season, second only to Barcelona's Lionel Messi with 29.
Madrid's win kept it in third place and provisionally reduced the gap with Barcelona to 12 points before the league leaders hosted Osasuna later Sunday.
Madrid hosts Barcelona in the first leg of their Copa del Rey semifinal on Wednesday.
"It will be a tough game," Ronaldo said. "Barcelona is a fantastic team. We will be missing several important players [Iker Casillas, Pepe, Angel Di Maria], but that is not an excuse. It will be a great night."
Even though its league title defense looks almost impossible, Carvalho said Madrid was still going all out for victory.
"The most important thing is to win games, in the league as well, since it makes us stronger for the Copa del Rey and Champions League," Carvalho said.
Madrid hosts Manchester United in the Champions League knockout stage on Feb. 13.
Ahead 1-0, Madrid didn't look back.
Ronaldo finished off a counterattack from its own area in the 62nd, running onto Oezil's pass and firing the ball beyond Moya and inside the far upright.
Three minutes later, Ronaldo made it 3-0 as he charged in unmarked behind Gonzalo Higuain to head home Angel Di Maria's floated cross at the far post.
The Portugal forward, rarely substituted, was taken off seconds later to the applause of the Santiago Bernabeu crowd.
Later Sunday, second-place Atletico Madrid visits Athletic Bilbao, Malaga is at Mallorca, and Rayo Vallecano hosts Real Betis.
Information from Press Association was used in this report.