The Blues romped to a comfortable 4-0 victory in Romania as they picked up their first points of this season's competition.
"Chelsea were very professional," Wilkins told Sky Sports News. "They had to come out in the second half and be professional and that's exactly what they did. With 15 minutes to go it was almost a five-a-side game or a testimonial game.
"When you're playing away from home it's important to take the game away from the opposition. Somewhere like Romania isn't easy and it's a big atmosphere. I was very impressed with them."
Chelsea travel to Norwich City on Saturday in the Premier League.