Vertonghen netted the opener as Spurs recorded a 2-0 win, and the Belgium international was impressed with the performance of the Moldovan champions.
The 26-year-old told the London Evening Standard: "It's the best team that we've played so far this season in the Europa League, so it's a good result for us.
"It wasn't our best game but we kept a clean sheet and we won a difficult away game, so we can be happy.
"It was nice because I haven't scored this season, so it's good to have my first goal."
Victory for Spurs took them to the brink of qualifying for the knockout stages of the competition.