The Saints scored two goals from dead-ball situations in their 2-2 draw with Leicester City two weekends' ago, and they backed up that display by netting from a free-kick in their match against Liverpool on Saturday.
Southampton were 1-0 down in the contest an Anfield, but when Gaston Ramirez headed across goal, Sadio Mane prodded the ball over the line.
And Fonte said: "Again, set pieces are at the moment massive for us and we showed again that we are very dangerous.
“We have people who want to attack, who want to score goals and the last few games we have been very dangerous on these and we got some good goals and we’re happy with that.”
Southampton's increased threat from set-pieces has come largely as a result of the addition of Virgil Van Dijk in the summer.
Van Dijk signed from Celtic during the previous transfer window, and the centre-back has immediately proven to be a very big threat in the air from attacking set-plays.
Southampton have generally been a side that prides itself on playing flowing football, but they have shown another side to their game by scoring from dead-balls so often.
It has helped their form improve too, with the Saints now unbeaten in five matches, and they currently sit in eighth place in the Premier League table.