The visitors did all their scoring within the first 47 minutes of the game, with outside centre Chris Hyndman, fly-half Shane Drahm and Kiwi fullback Bruce Reihana all running in tries.
Drahm did the rest of the scoring with his accurate right boot, accounting for the extra seven points in the final analysis – via two conversions and one penalty goal.
There were some nervous moments for Northampton in the final 10 minutes of the match when their All Black No.9 Mark 'Sharkey' Robinson was yellow-carded, but Saints managed to hold out for the all-important win.
Fijian veteran Nicky Little, playing at inside centre, with Frenchman Thomas Castaignède back from injury at fly-half, scored one try and added one conversion and two penalty goals for Saracens. Centre Robbie Kydd scored Sarries' other try.
Little's try, in the third minute, put the home side into a comfortable 7-0 lead, but Drahm cut the scoreline in the 17th minute with a penalty goal. Little cancelled out Drahm's three-pointer in the 24th minute, but Hyndman's try in the 26th minute, followed after half-time by Drahm's score – when former French hooker Raphaël Ibañez was in the sin bin – put the visitors on the road to victory.
For Saracens:Tries: Little, KyddCon: LittlePens: Little 2
For Northampton Saints:Tries: Hyndman, Drahm, ReihanaCons: Drahm 2Pen: Drahm