"I was dizzy during BP and tried to gut it out as best I could today," said Youkilis, who exited due to an upset stomach in the middle of the fifth inning and was replaced by Eduardo Escobar at third base. "I really didn't have anything in the tank.
"Once we got to the fourth inning, I went back up [to the clubhouse] and came back out, and I was hurting. I was pretty pale and my stomach wasn't cooperating."
Youkilis, who was acquired with cash considerations from the Red Sox on Sunday in exchange for Brent Lillibridge and right-hander Zach Stewart, drove in a run via a second-inning groundout but joined Escobar as the only hitless White Sox in the game. He ruled out the flu postgame and said he figured to be back in the starting lineup on Saturday afternoon.
Manager Robin Ventura said his team would stick with the same lineup, leaving Youkilis' spot open until Saturday to make sure he was OK.
"They said it was just food; they took my temperature," Youkilis said. "For me, I knew it wasn't the flu. It was something bad. And maybe if it wasn't such a hot day, it would have helped.
"Being out there sweating, you're hurting the team if you can't hit the ball. I wish I could have played, but hopefully I'll be out there tomorrow morning. If my stomach doesn't hurt me, I'm ready to go. I'll get what I need in my system."