Finn Smith continued his fine form in a Northampton Saints shirt on Friday, winning against Owen Farrell and Saracens.
The England fly-half won three caps off the bench during the Six Nations campaign, controlling the game superbly and winning the Man of the Match award in a 41-30 win.
Northampton had a total of five tries from Alex Coles and James Lamb as they overcame a 17-0 buffer after 17 minutes.
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Sarries fought back and a try from Theo McFarland and back-to-back penalties from Farrell cut the gap to four points, but Saints won easily in the second period.
Lam scored twice, while Tommy Freeman and Ollie Slightholme, playing his first game since the Six Nations, also ensured the victory.
Saracens earned a late try bonus point as Ben Earl's early score was joined by an Alex Lewington double, but the Premier League side looked to have found their rhythm during last weekend's 52-7 thrashing of Harlequins. It was another setback for the defending Shipp champions. .
Saints put Saracens under pressure and came out of the blocks and eventually took the lead when Smith released Coles for an early lead.
Smith converted and quickly converted again as Saints added a second goal, and eventually a fine run from Sleightholm led to a try for Lamb.
Northampton were better at the scrum, winning a penalty with Smith scoring from in front of the posts.
But Saracens gave Saints a nasty punch when Tom James was charged as he tried to clear, allowing McFarland to gather and score.
Northampton quickly cut the lead to seven points and quickly added a penalty, scored by Farrell.
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The visitors looked certain to score two minutes before the break, but Nick Tompkins was knocked on by a huge defensive set from Saints.
The gap remained seven points at the break, but Farrell's penalty early in the second period narrowed the gap to four points.
But after Saints hit back hard and caused panic with a quick tap penalty from James, Saracens showed an opening as Lamb cruised in for his second try of the night.
Smith scored, but Northampton shot himself in the foot again as Lamb tried to clear inside his own 22, and Earl charged a kickdown before looking to score.
Farrell scored to make the difference just seven points, but Saracens lost Lewington to the sin bin with a deliberate knock-on.
Northampton immediately took the advantage, creating a flowing movement and after Freeman finished, Sleightholm touched down under the posts to make the game safe.
Saracens were sure to come home with something to show after Smith was sin-binned, and Lewington scored two tries in the final two minutes to earn them a bonus point.
team
Northampton: 15 James Lamb, 14 Tommy Freeman, 13 Berger Odendaal, 12 Fraser Dingwall, 11 Ollie Slightholm, 10 Finn Smith, 9 Tom James, 8 Juano Augustus, 7 Tom Pearson, 6 Courtney Laws (c), 5 Alex Coles, 4 Alex Moon, 3 Trevor Davison, 2 Curtis Langdon, 1 Emmanuel Iyogun
Replacement: 16 Sam Matabesi, 17 Alex Waller, 18 Ed Prowse, 19 Temo Mayanavanua, 20 Lewis Ludlum, 21 Sam Graham, 22 Archie McParland, 23 Tom Litchfield
Saracens: 15 Elliot Daly, 14 Sean Maitland, 13 Lucio Cinti, 12 Nick Tompkins, 11 Alex Lewington, 10 Owen Farrell (c), 9 Ivan van Zyl, 8 Billy Vunipola, 7 Andy Christie , 6 Juan Martin Gonzalez, 5 Nick Aishekwe, 4 Theo McFarland, 3 Marco Riccioni, 2 Jamie George, 1 Mako Vunipola
Replacement: 16 Theo Dunn, 17 Eloni Mawi, 18 Christian Judge, 19 Hugh Tizard, 20 Tom Willis, 21 Ben Earl, 22 Gareth Simpson, 23 Alex Goode
Referee: luke pierce
Assistant referee: Joe James, Andrew Jackson
TMO: Ian Tempest
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