"I think everyone saw what the lads did on the field. I am proud of what they did," Seedorf told Sky Sport Italia.
"In the last 20 minutes we lost our intensity and Atletico started to get closer, even without creating that many chances.
"We were a little unlucky with the goal, but I saw some very good responses in the first half."
Mario Balotelli went off with a shoulder problem after a nasty fall and was seen leaving the stadium with heavy strapping.
"I thought Balotelli did a lot of good things tonight, worrying the defence and creating chances. He is growing and it takes time for all the forwards to get to know each other better, as they aren't quite in sync yet with this system."
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