The relegation-threatened Reds followed up their clean sheet against QPR last week with another shut-out against London opponents as they did not let in a goal for the fifth time in seven matches.
The positivism was tempered by the fact that the Oakwell outfit failed to record another morale-boosting victory on an afternoon when fellow strugglers Luton and Charlton managed to win in their early kick-offs.
But Struber's glass remains very much half-full and he was particularly delighted for Andersen, who followed his sound performance at Loftus Road with another encouraging display to start getting back in the good books of supporters following his difficulties and several high-profile mistakes earlier this season.
Struber said: "Mads played a fantastic game and he was so reliable in every situation.
"I am happy. We played against a massive opponent, especially on the physical side and it was a challenge for us. Especially from set-piece situations, but my boys did a brilliant job and everyone was clear in their task and had the right attitude.
"It was a big challenge against this massive opponent and especially in the first half, we had not so much control on the ball.
"In the end, maybe it could be a very important point and I hope especially for the next game, everyone can feel we can also bring a good performance against an opponent with special physical strengths."
On the fillip of a second consecutive clean sheet, the Austrian added: "Absolutely. This gives everyone a very good feeling in our defensive structure, especially press defending and box defending. My boys made a very good job with a high focus, but we need more control on the ball to find more chances.
"But 0-0 is one point and we hope we can pick up the necessary points on Tuesday.
"The problem is more the results from the other teams behind and near us. But it is not in our hands."