"I'm having tests today and we will see," Silva told the club's official website. "The tests will confirm whether I will be able to play or not.
"I can still feel the injury so I have to wait to see what the tests show, but hopefully I will recover enough to travel with the squad.
"It would be a big blow for me to miss the semi-final because it's a game every player wants to play in. If I can't play, there's always a strong replacement that can come in for me but let's see how things pan out."
Fellow Premier League outfit Wigan Athletic are also preparing for their semi-final clash against Millwall on Saturday.