"I was comfortable with him a week ago," Romo said Thursday. "It's about improving every day. [Just] because in the game it looked better, it didn't mean that we hadn't been practicing a certain way or that we weren't improving on the practice field."
Romo and Williams finally seemed to develop a connection during Sunday's game against the Philadelphia Eagles, with the receiver catching five passes for 75 yards.
It was the most catches in a game for Williams since the Cowboys dealt three draft picks to the Detroit Lions for him last October.
Last week, Romo and Williams worked after practice to help improve their chemistry after Williams had voiced his frustrations publicly. During games this season, Williams said Romo threw better passes to the team's other receivers, and passes to Williams were either high or behind him.
How Williams got out of his breaks, Romo's trust in him and defensive coverages were other issues.
Before Sunday's game, Romo had completed just 14 out of 37 passes to Williams, while the quarterback had better numbers with tight end Jason Witten (37-48), receiver Miles Austin (26-72) and Patrick Crayton (20-39).
"For me, I practice at the same tempo in practice that I do in the game," Romo said. "So if I'm doing it out there and I'm seeing things out there, I expect it to be the same in the game. That's what I believe, that's how I've always practiced and that's how I believe you can get better."
Williams said his comfort level is getting better with Romo. The emergence of Austin -- who has six touchdowns in the last four weeks -- has forced defenses to pay attention to him. The Eagles tried to slow Austin down, holding the receiver without a catch until his 49-yard touchdown reception in the fourth quarter.
The extra work in practice and Austin getting more defensive attention might open the door for Williams to produce more.
"You have to understand, my catches were all slants," Williams said. "It really wasn't nothing else. That's a good starting point for us. We'll only get better, and we'll see what happens this Sunday."
Calvin Watkins covers the Cowboys for ESPNDallas.com. E-mail firstname.lastname@example.org.