Spurs had started the game brightly, but they found themselves two goals down after 31 minutes at Wembley.
Alderweireld managed to pull back one on the stroke of half-time, but Spurs couldn't add another one in the second half as their Group E campaign kicked without a point.
"Scoring creates momentum and we dominated the game in the second half," the Belgian told BT Sport.
"We had chances but we couldn't score. We put a lot of energy in but we couldn't force it."