'DWTS:' Will Ralph Macchio perform tonight?

 As you may have heard, the Ralph Macchio express on "Dancing with the Stars" had a little bt of a detour last week. While training, he injured himself, and this one sounds not good. 

"Have missed days of rehearsal this week," Macchio, 49, posted on Twitter - as relayed by People Mag a short while ago. "Had a ruptured cyst on the back of my knee causing acute pain. Hoping to be able to perform tonight!"

  Meanwhile, I have just heard: ABC and 'DWTS' do expect him to perform tonight. So watch...unless you need to be reminded...and vote...