Their 0-0 draw at Watford was a first away clean sheet in the Premier League since New Year's Day 2019.
"You only see us improving," said Alderweireld. “In the Liverpool game, I think we defended very well. Saturday, in a difficult moment we defended very well and a clean sheet, the first one in a while, so we're going in the right direction."
Japhet Tanganga has been part of the solution and the 20-year-old started a third consecutive match at Vicarage Road in an unfamiliar left-back role.
“He's played three good games and Saturday on a yellow [card] quite quickly and a difficult opponent [in Ismaila Sarr], so that's not easy, but I think he handled it very well," said Alderweireld.