The Iceland midfielder struck a beauty to complete the turn around from 2-0 down to 3-2 against the Saints in a Premier League thriller at the Lane on Sunday.
Tim Sherwood said Gylfi ‘gave the team a spark’ after entering the action at half-time for Mousa Dembele.
We were 2-1 down then with the Saints steaming into a 2-0 lead inside half-hour.
Christian Eriksen reduced the deficit on 31 minutes, levelled it up a minute into the second half and then after constant pressure, he provided the pass for Gylfi’s moment of magic with 91.52 on the clock.
“It’s the best feeling, scoring a goal, especially the winner and as the lads said, being 2-0 down and coming back to score a last-minute winner for 3-2 is fantastic,” said Gylfi.
“Hugo went long then Christian laid it off, I was thinking about passing it wide for a cross but it sat quite nicely so I went for it and thankfully, I hit it well. I got my head over the ball, tried to keep it low and it went in.”
Gylfi said Christian’s goal for 2-1 was key to the turn around.
“When we scored the first goal the energy changed in the stadium and in the players as well.
“Tim said a few words at half-time, we managed to score an early goal in the second half and we really pushed on from there.
“It was great to get the three points, especially after the way we started the game and being able to bounce back like we did. It was fantastic.”