Ron Vlaar praised Aston Villa's mentality after his side recovered from two goals down to draw 2-2 at West Bromwich Albion.
Shane Long's early double put West Brom in command in the West Midlands derby and Stephane Sessegnon then missed a great chance to score a third goal.
However, a triple substitution on 57 minutes kick-started Villa and goals from Karim El Ahmadi and Ashley Westwood secured the visitors a point.
"I'm very happy with that," Vlaar told Sky Sports. "We showed some mentality today.
"The first half was not good at all. If you start the game the way we started, you know you're going to get in trouble, and they scored two goals in the first 10 minutes.
"They had a very good chance of a third goal and we were lucky they didn't score. In the second half, we turned it around and I'm very proud of that.
"Today shows we are capable of a lot of things and we have to believe in the things we can do. We should be fine now."
Fabian Delph, Andreas Weimann and Gabriel Agbonlahor came on as substitutes following recent injury problems, and Vlaar acknowledged the changes were necessary.
The defender said: "We had to change something, that was obvious, and I think we did.
"We played more long balls and put more battles in the game. You have to be lucky to score a goal and we did, and the second goal was great.
"You could see the first touch from Andi was almost a goal, which was deflected, and they gave some energy for us, and for the fans, and I'm happy they're back from injury as we need every player."